diff --git a/apps/server/src/api-data/sheets/DeviceAuthProvider.ts b/apps/server/src/api-data/sheets/DeviceAuthProvider.ts
new file mode 100644
index 0000000000..2637be5ae1
--- /dev/null
+++ b/apps/server/src/api-data/sheets/DeviceAuthProvider.ts
@@ -0,0 +1,179 @@
+import { Credentials, OAuth2Client } from 'google-auth-library';
+import { logger } from '../../classes/Logger.js';
+import { LogOrigin, MaybeString, AuthenticationStatus } from 'ontime-types';
+import { consoleSubdued } from '../../utils/console.js';
+import { type ClientSecret } from './sheets.utils.js';
+
+const codesUrl = 'https://oauth2.googleapis.com/device/code';
+const tokenUrl = 'https://oauth2.googleapis.com/token';
+const grantType = 'urn:ietf:params:oauth:grant-type:device_code';
+const sheetScope = 'https://www.googleapis.com/auth/spreadsheets';
+
+type CodesResponse = {
+  device_code: string;
+  expires_in: number;
+  interval: number;
+  user_code: string;
+  verification_url: string;
+};
+
+export class DeviceAuthProvider {
+  private currentAuthClient: OAuth2Client | null = null;
+  private currentAuthUrl: MaybeString = null;
+  private currentAuthCode: MaybeString = null;
+  private pollInterval: NodeJS.Timeout | null = null;
+  private cleanupTimeout: NodeJS.Timeout | null = null;
+
+  constructor() {}
+
+  getStatus(): AuthenticationStatus {
+    if (this.cleanupTimeout) {
+      return 'pending';
+    }
+    return this.currentAuthClient ? 'authenticated' : 'not_authenticated';
+  }
+
+  getAuthClient(): OAuth2Client | null {
+    return this.currentAuthClient;
+  }
+
+  getPendingData() {
+    return {
+      verification_url: this.currentAuthUrl,
+      user_code: this.currentAuthCode,
+    };
+  }
+
+  revoke() {
+    this.reset();
+  }
+
+  private reset() {
+    this.currentAuthClient = null;
+    this.currentAuthUrl = null;
+    this.currentAuthCode = null;
+
+    if (this.pollInterval) {
+      clearInterval(this.pollInterval);
+      this.pollInterval = null;
+    }
+    if (this.cleanupTimeout) {
+      clearTimeout(this.cleanupTimeout);
+      this.cleanupTimeout = null;
+    }
+  }
+
+  async authenticate(clientSecret: ClientSecret, onAuthenticated: (client: OAuth2Client) => Promise<void>) {
+    const { device_code, expires_in, interval, user_code, verification_url } = await this.getDeviceCodes(clientSecret);
+    this.currentAuthUrl = verification_url;
+    this.currentAuthCode = user_code;
+
+    this.verifyConnection(clientSecret, device_code, interval, expires_in, onAuthenticated);
+
+    return { verification_url, user_code };
+  }
+
+  private async getDeviceCodes(clientSecret: ClientSecret): Promise<CodesResponse> {
+    const response = await fetch(codesUrl, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({
+        client_id: clientSecret.installed.client_id,
+        scope: sheetScope,
+      }),
+    });
+
+    if (!response.ok) {
+      const errorText = await response.text();
+      throw new Error(`Failed to fetch device codes: ${response.status} ${response.statusText} - ${errorText}`);
+    }
+
+    const deviceCodes: CodesResponse = await response.json();
+    return deviceCodes;
+  }
+
+  private verifyConnection(
+    clientSecret: ClientSecret,
+    device_code: string,
+    interval: number,
+    expires_in: number,
+    onAuthenticated: (client: OAuth2Client) => Promise<void>,
+  ) {
+    logger.info(LogOrigin.Server, 'Start polling for auth...');
+
+    this.pollInterval = setInterval(() => this.pollForAuth(clientSecret, device_code, onAuthenticated), interval * 1000);
+
+    if (this.cleanupTimeout) {
+      clearTimeout(this.cleanupTimeout);
+    }
+    this.cleanupTimeout = setTimeout(() => {
+      if (this.pollInterval) {
+        clearInterval(this.pollInterval);
+        this.pollInterval = null;
+      }
+      this.cleanupTimeout = null;
+    }, expires_in * 1000);
+  }
+
+  private async pollForAuth(
+    clientSecret: ClientSecret,
+    device_code: string,
+    onAuthenticated: (client: OAuth2Client) => Promise<void>,
+  ) {
+    try {
+      const response = await fetch(tokenUrl, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          client_id: clientSecret.installed.client_id,
+          client_secret: clientSecret.installed.client_secret,
+          device_code,
+          grant_type: grantType,
+        }),
+      });
+
+      if (response.status === 428) {
+        consoleSubdued('User not auth yet');
+        return;
+      }
+
+      if (!response.ok) {
+        logger.error(LogOrigin.Server, `Authentication poll failed with code: ${response.status}`);
+        return;
+      }
+
+      const auth: Credentials = await response.json();
+
+      logger.info(LogOrigin.Server, 'Successfully Authenticated');
+      const client = new OAuth2Client({
+        clientId: clientSecret.installed.client_id,
+        clientSecret: clientSecret.installed.client_secret,
+      });
+
+      client.setCredentials({
+        refresh_token: auth.refresh_token,
+        access_token: auth.access_token,
+        scope: auth.scope,
+        token_type: auth.token_type,
+      });
+
+      this.currentAuthClient = client;
+
+      if (this.cleanupTimeout) {
+        clearTimeout(this.cleanupTimeout);
+        this.cleanupTimeout = null;
+      }
+
+      if (this.pollInterval) {
+        clearInterval(this.pollInterval);
+        this.pollInterval = null;
+      }
+
+      await onAuthenticated(client);
+    } catch (error) {
+      logger.error(LogOrigin.Server, `Authentication poll error: ${(error as Error).message}`);
+    }
+  }
+}
diff --git a/apps/server/src/api-data/sheets/GoogleSheetsClient.ts b/apps/server/src/api-data/sheets/GoogleSheetsClient.ts
new file mode 100644
index 0000000000..7472e1b9ec
--- /dev/null
+++ b/apps/server/src/api-data/sheets/GoogleSheetsClient.ts
@@ -0,0 +1,41 @@
+import { sheets, type sheets_v4 } from '@googleapis/sheets';
+import { OAuth2Client } from 'google-auth-library';
+
+export class GoogleSheetsClient {
+  private sheets: sheets_v4.Sheets;
+
+  constructor(auth: OAuth2Client) {
+    this.sheets = sheets({ version: 'v4', auth });
+  }
+
+  async getSpreadsheet(spreadsheetId: string) {
+    return this.sheets.spreadsheets.get({
+      spreadsheetId,
+      includeGridData: false,
+    });
+  }
+
+  async getValues(spreadsheetId: string, range: string) {
+    return this.sheets.spreadsheets.values.get({
+      spreadsheetId,
+      valueRenderOption: 'FORMATTED_VALUE',
+      majorDimension: 'ROWS',
+      range,
+    });
+  }
+
+  async batchUpdate(
+    spreadsheetId: string,
+    requests: sheets_v4.Schema$Request[],
+    responseRanges?: string[],
+  ) {
+    return this.sheets.spreadsheets.batchUpdate({
+      spreadsheetId,
+      requestBody: {
+        includeSpreadsheetInResponse: false,
+        responseRanges,
+        requests,
+      },
+    });
+  }
+}
diff --git a/apps/server/src/api-data/sheets/__tests__/DeviceAuthProvider.test.ts b/apps/server/src/api-data/sheets/__tests__/DeviceAuthProvider.test.ts
new file mode 100644
index 0000000000..cb50414d76
--- /dev/null
+++ b/apps/server/src/api-data/sheets/__tests__/DeviceAuthProvider.test.ts
@@ -0,0 +1,138 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { DeviceAuthProvider } from '../DeviceAuthProvider.js';
+
+describe('DeviceAuthProvider', () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+    vi.stubGlobal('fetch', vi.fn());
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+    vi.unstubAllGlobals();
+  });
+
+  it('should start with not_authenticated status', () => {
+    const provider = new DeviceAuthProvider();
+    expect(provider.getStatus()).toBe('not_authenticated');
+  });
+
+  it('should initiate authentication and poll', async () => {
+    const provider = new DeviceAuthProvider();
+    const mockClientSecret = {
+      installed: {
+        client_id: 'id',
+        client_secret: 'secret',
+        auth_uri: '',
+        token_uri: '',
+        auth_provider_x509_cert_url: '',
+      },
+    };
+
+    (fetch as any).mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        device_code: 'dc',
+        expires_in: 60,
+        interval: 5,
+        user_code: 'uc',
+        verification_url: 'vurl',
+      }),
+    });
+
+    const onAuth = vi.fn();
+    const result = await provider.authenticate(mockClientSecret, onAuth);
+
+    expect(result).toEqual({
+      verification_url: 'vurl',
+      user_code: 'uc',
+    });
+    expect(provider.getStatus()).toBe('pending');
+    expect(fetch).toHaveBeenCalledTimes(1);
+
+    // Poll 1: not yet authorized
+    (fetch as any).mockResolvedValueOnce({
+      status: 428,
+      ok: false,
+    });
+
+    vi.advanceTimersByTime(5000);
+    // Poll happens in background
+    await vi.waitFor(() => expect(fetch).toHaveBeenCalledTimes(2));
+    expect(provider.getStatus()).toBe('pending');
+
+    // Poll 2: success
+    (fetch as any).mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        access_token: 'at',
+        refresh_token: 'rt',
+        scope: 'scope',
+        token_type: 'Bearer',
+      }),
+    });
+
+    vi.advanceTimersByTime(5000);
+    await vi.waitFor(() => expect(onAuth).toHaveBeenCalled());
+    expect(provider.getStatus()).toBe('authenticated');
+  });
+
+  it('should stop polling after expiration', async () => {
+    const provider = new DeviceAuthProvider();
+    const mockClientSecret = {
+      installed: {
+        client_id: 'id',
+        client_secret: 'secret',
+        auth_uri: '',
+        token_uri: '',
+        auth_provider_x509_cert_url: '',
+      },
+    };
+
+    (fetch as any).mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        device_code: 'dc',
+        expires_in: 10,
+        interval: 5,
+        user_code: 'uc',
+        verification_url: 'vurl',
+      }),
+    });
+
+    await provider.authenticate(mockClientSecret, vi.fn());
+    expect(provider.getStatus()).toBe('pending');
+
+    vi.advanceTimersByTime(11000);
+    expect(provider.getStatus()).toBe('not_authenticated');
+  });
+
+  it('should reset on revoke', async () => {
+    const provider = new DeviceAuthProvider();
+    const mockClientSecret = {
+      installed: {
+        client_id: 'id',
+        client_secret: 'secret',
+        auth_uri: '',
+        token_uri: '',
+        auth_provider_x509_cert_url: '',
+      },
+    };
+
+    (fetch as any).mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        device_code: 'dc',
+        expires_in: 60,
+        interval: 5,
+        user_code: 'uc',
+        verification_url: 'vurl',
+      }),
+    });
+
+    await provider.authenticate(mockClientSecret, vi.fn());
+    provider.revoke();
+    expect(provider.getStatus()).toBe('not_authenticated');
+    expect(provider.getAuthClient()).toBeNull();
+  });
+});
diff --git a/apps/server/src/api-data/sheets/__tests__/GoogleSheetsClient.test.ts b/apps/server/src/api-data/sheets/__tests__/GoogleSheetsClient.test.ts
new file mode 100644
index 0000000000..ec276eb526
--- /dev/null
+++ b/apps/server/src/api-data/sheets/__tests__/GoogleSheetsClient.test.ts
@@ -0,0 +1,60 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { sheets } from '@googleapis/sheets';
+import { GoogleSheetsClient } from '../GoogleSheetsClient.js';
+
+vi.mock('@googleapis/sheets', () => ({
+  sheets: vi.fn(),
+}));
+
+describe('GoogleSheetsClient', () => {
+  let mockSheets: any;
+
+  beforeEach(() => {
+    mockSheets = {
+      spreadsheets: {
+        get: vi.fn(),
+        values: {
+          get: vi.fn(),
+        },
+        batchUpdate: vi.fn(),
+      },
+    };
+    (sheets as any).mockReturnValue(mockSheets);
+  });
+
+  it('should call spreadsheets.get', async () => {
+    const client = new GoogleSheetsClient({} as any);
+    mockSheets.spreadsheets.get.mockResolvedValue({ data: {} });
+    await client.getSpreadsheet('id');
+    expect(mockSheets.spreadsheets.get).toHaveBeenCalledWith({
+      spreadsheetId: 'id',
+      includeGridData: false,
+    });
+  });
+
+  it('should call spreadsheets.values.get', async () => {
+    const client = new GoogleSheetsClient({} as any);
+    mockSheets.spreadsheets.values.get.mockResolvedValue({ data: {} });
+    await client.getValues('id', 'range');
+    expect(mockSheets.spreadsheets.values.get).toHaveBeenCalledWith({
+      spreadsheetId: 'id',
+      valueRenderOption: 'FORMATTED_VALUE',
+      majorDimension: 'ROWS',
+      range: 'range',
+    });
+  });
+
+  it('should call spreadsheets.batchUpdate', async () => {
+    const client = new GoogleSheetsClient({} as any);
+    mockSheets.spreadsheets.batchUpdate.mockResolvedValue({ data: {} });
+    await client.batchUpdate('id', [{ updateCells: {} }], ['range']);
+    expect(mockSheets.spreadsheets.batchUpdate).toHaveBeenCalledWith({
+      spreadsheetId: 'id',
+      requestBody: {
+        includeSpreadsheetInResponse: false,
+        responseRanges: ['range'],
+        requests: [{ updateCells: {} }],
+      },
+    });
+  });
+});
diff --git a/apps/server/src/api-data/sheets/sheets.service.ts b/apps/server/src/api-data/sheets/sheets.service.ts
index aa16725d5a..1e374dbb36 100644
--- a/apps/server/src/api-data/sheets/sheets.service.ts
+++ b/apps/server/src/api-data/sheets/sheets.service.ts
@@ -20,8 +20,8 @@ import {
 } from 'ontime-types';
 import { ImportMap, getErrorMessage } from 'ontime-utils';
 
-import { sheets, type sheets_v4 } from '@googleapis/sheets';
-import { Credentials, OAuth2Client } from 'google-auth-library';
+import { type sheets_v4 } from '@googleapis/sheets';
+import { OAuth2Client } from 'google-auth-library';
 
 import { logger } from '../../classes/Logger.js';
 import { parseRundowns } from '../rundown/rundown.parser.js';
@@ -29,42 +29,18 @@ import { parseRundowns } from '../rundown/rundown.parser.js';
 import { getCurrentRundown, getProjectCustomFields, processRundown } from '../rundown/rundown.dao.js';
 import { parseExcel } from '../excel/excel.parser.js';
 import { parseCustomFields } from '../custom-fields/customFields.parser.js';
-import { consoleSubdued } from '../../utils/console.js';
 
 import { cellRequestFromEvent, type ClientSecret, getA1Notation, isClientSecret } from './sheets.utils.js';
 import { catchCommonImportXlsxError } from './googleApi.utils.js';
+import { DeviceAuthProvider } from './DeviceAuthProvider.js';
+import { GoogleSheetsClient } from './GoogleSheetsClient.js';
 
-const sheetScope = 'https://www.googleapis.com/auth/spreadsheets';
-const codesUrl = 'https://oauth2.googleapis.com/device/code';
-const tokenUrl = 'https://oauth2.googleapis.com/token';
-const grantType = 'urn:ietf:params:oauth:grant-type:device_code';
-
-let currentAuthClient: OAuth2Client | null = null;
-let currentClientSecret: ClientSecret | null = null;
-let currentAuthUrl: MaybeString = null;
-let currentAuthCode: MaybeString = null;
-
+const authProvider = new DeviceAuthProvider();
 let currentSheetId: MaybeString = null;
 
-let pollInterval: NodeJS.Timeout | null = null;
-let cleanupTimeout: NodeJS.Timeout | null = null;
-
 function reset() {
-  currentAuthClient = null;
-  currentClientSecret = null;
-  currentAuthUrl = null;
-  currentAuthCode = null;
-
+  authProvider.revoke();
   currentSheetId = null;
-
-  if (pollInterval) {
-    clearInterval(pollInterval);
-    pollInterval = null;
-  }
-  if (cleanupTimeout) {
-    clearTimeout(cleanupTimeout);
-    cleanupTimeout = null;
-  }
 }
 
 /**
@@ -95,148 +71,20 @@ export function handleClientSecret(clientSecret: string): ClientSecret {
   return clientSecretObject;
 }
 
-// https://developers.google.com/identity/protocols/oauth2/limited-input-device#success-response
-type CodesResponse = {
-  device_code: string;
-  expires_in: number;
-  interval: number;
-  user_code: string;
-  verification_url: string;
-};
-
-/**
- * Establishes connection with Google Auth server and retrieves device codes
- */
-async function getDeviceCodes(clientSecret: ClientSecret): Promise<CodesResponse> {
-  const response = await fetch(codesUrl, {
-    method: 'POST',
-    headers: {
-      'Content-Type': 'application/json',
-    },
-    body: JSON.stringify({
-      client_id: clientSecret.installed.client_id,
-      scope: sheetScope,
-    }),
-  });
-
-  if (!response.ok) {
-    const errorText = await response.text();
-    throw new Error(`Failed to fetch device codes: ${response.status} ${response.statusText} - ${errorText}`);
-  }
-
-  const deviceCodes: CodesResponse = await response.json();
-  return deviceCodes;
-}
-
-/**
- * Gets credentials from Google Auth server
- */
-function verifyConnection(
-  clientSecret: ClientSecret,
-  device_code: string,
-  interval: number,
-  expires_in: number,
-  postAction: () => Promise<any>,
-) {
-  logger.info(LogOrigin.Server, 'Start polling for auth...');
-
-  // create poller to check for auth
-  pollInterval = setInterval(pollForAuth, interval * 1000);
-
-  // schedule to clear the poller when we know the token is no longer valid
-  if (cleanupTimeout) {
-    clearTimeout(cleanupTimeout);
-    cleanupTimeout = null;
-  }
-  cleanupTimeout = setTimeout(() => {
-    if (pollInterval) {
-      clearInterval(pollInterval);
-      pollInterval = null;
-    }
-  }, expires_in * 1000);
-
-  async function pollForAuth() {
-    try {
-      const response = await fetch(tokenUrl, {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({
-          client_id: clientSecret.installed.client_id,
-          client_secret: clientSecret.installed.client_secret,
-          device_code,
-          grant_type: grantType,
-        }),
-      });
-
-      // server returns 428 if user hasnt yet completed the auth process
-      if (response.status === 428) {
-        consoleSubdued('User not auth yet');
-        return;
-      }
-
-      if (!response.ok) {
-        logger.error(LogOrigin.Server, `Authentication poll failed with code: ${response.status}`);
-        return;
-      }
-
-      const auth: Credentials = await response.json();
-
-      logger.info(LogOrigin.Server, 'Successfully Authenticated');
-      const client = new OAuth2Client({
-        clientId: clientSecret.installed.client_id,
-        clientSecret: clientSecret.installed.client_secret,
-      });
-
-      client.setCredentials({
-        refresh_token: auth.refresh_token,
-        access_token: auth.access_token,
-        scope: auth.scope,
-        token_type: auth.token_type,
-      });
-
-      // save client and cancel tasks
-      currentAuthClient = client;
-
-      if (cleanupTimeout) {
-        clearTimeout(cleanupTimeout);
-        cleanupTimeout = null;
-      }
-
-      if (pollInterval) {
-        clearInterval(pollInterval);
-        pollInterval = null;
-      }
-
-      await postAction();
-    } catch (error) {
-      logger.error(LogOrigin.Server, `Authentication poll error: ${(error as Error).message}`);
-    }
-  }
-}
-
 export function hasAuth(): { authenticated: AuthenticationStatus; sheetId: string } {
   if (!currentSheetId) {
     throw new Error('No sheet ID');
   }
-  if (cleanupTimeout) {
-    return { authenticated: 'pending', sheetId: currentSheetId };
-  }
-  return { authenticated: currentAuthClient ? 'authenticated' : 'not_authenticated', sheetId: currentSheetId };
+  return { authenticated: authProvider.getStatus(), sheetId: currentSheetId };
 }
 
 async function verifySheet(
-  sheetId = currentSheetId,
-  authClient = currentAuthClient,
+  sheetId: string,
+  authClient: OAuth2Client,
 ): Promise<{ worksheetOptions: string[] }> {
-  if (!sheetId || !authClient) {
-    throw new Error('Missing sheet ID or authentication');
-  }
-
   try {
-    const spreadsheets = await sheets({ version: 'v4', auth: authClient }).spreadsheets.get({
-      spreadsheetId: sheetId,
-      includeGridData: false,
-    });
+    const client = new GoogleSheetsClient(authClient);
+    const spreadsheets = await client.getSpreadsheet(sheetId);
 
     const worksheets: string[] = [];
     spreadsheets.data.sheets?.forEach((sheet) => {
@@ -261,26 +109,17 @@ export async function handleInitialConnection(
   clientSecret: ClientSecret,
   sheetId: string,
 ): Promise<{ verification_url: string; user_code: string }> {
-  currentClientSecret = clientSecret;
+  currentSheetId = sheetId;
 
-  // we know there is an ongoing process if there is a timeout for cleanup
-  // if there is an ongoing process, we return its data
-  if (cleanupTimeout) {
-    if (!currentAuthUrl || !currentAuthCode) {
+  if (authProvider.getStatus() === 'pending') {
+    const pendingData = authProvider.getPendingData();
+    if (!pendingData.verification_url || !pendingData.user_code) {
       throw new Error('No ongoing connection');
     }
-    return { verification_url: currentAuthUrl, user_code: currentAuthCode };
+    return pendingData as { verification_url: string; user_code: string };
   }
 
-  const { device_code, expires_in, interval, user_code, verification_url } = await getDeviceCodes(currentClientSecret);
-  currentAuthUrl = verification_url;
-  currentAuthCode = user_code;
-  currentSheetId = sheetId;
-
-  // schedule verifying token and the existence of the sheetID
-  verifyConnection(currentClientSecret, device_code, interval, expires_in, verifySheet);
-
-  return { verification_url, user_code };
+  return authProvider.authenticate(clientSecret, (client) => verifySheet(sheetId, client).then(() => {}));
 }
 
 /**
@@ -288,22 +127,21 @@ export async function handleInitialConnection(
  * @returns
  */
 export async function getWorksheetOptions(sheetId: string): ReturnType<typeof verifySheet> {
-  if (!currentAuthClient) {
+  const authClient = authProvider.getAuthClient();
+  if (!authClient) {
     throw new Error('Not authenticated');
   }
   currentSheetId = sheetId;
 
-  return verifySheet(sheetId);
+  return verifySheet(sheetId, authClient);
 }
 
-async function verifyWorksheet(sheetId: string, worksheet: string): Promise<{ worksheetId: number; range: string }> {
-  if (!currentAuthClient) {
-    throw new Error('Not authenticated');
-  }
-
-  const spreadsheets = await sheets({ version: 'v4', auth: currentAuthClient }).spreadsheets.get({
-    spreadsheetId: sheetId,
-  });
+async function verifyWorksheet(
+  client: GoogleSheetsClient,
+  sheetId: string,
+  worksheet: string,
+): Promise<{ worksheetId: number; range: string }> {
+  const spreadsheets = await client.getSpreadsheet(sheetId);
 
   if (spreadsheets.status !== 200) {
     throw new Error(`Request failed: ${spreadsheets.status} ${spreadsheets.statusText}`);
@@ -320,13 +158,7 @@ async function verifyWorksheet(sheetId: string, worksheet: string): Promise<{ wo
   if (!selectedWorksheet) {
     throw new Error('Could not find worksheet');
   }
-  /*
-    The first spreadsheet provided by google sheet has an id = 0,
-    so !0 returns true, the only other number that returns true in this setup is NaN,
-    so if x !== 0 && x !== NaN, then !x returns false, we indeed want !NaN to return true,
-    but we would like !0 to return false, reason why is also checked that the id is not 0,
-    because if it is 0, then I should not enter the condition.
-  */
+
   if (
     !selectedWorksheet.properties ||
     (!selectedWorksheet.properties.sheetId && selectedWorksheet.properties.sheetId !== 0)
@@ -342,18 +174,15 @@ async function verifyWorksheet(sheetId: string, worksheet: string): Promise<{ wo
 }
 
 export async function upload(sheetId: string, options: ImportMap) {
-  if (!currentAuthClient) {
+  const authClient = authProvider.getAuthClient();
+  if (!authClient) {
     throw new Error('Not authenticated');
   }
+  const client = new GoogleSheetsClient(authClient);
 
-  const { worksheetId, range } = await verifyWorksheet(sheetId, options.worksheet);
+  const { worksheetId, range } = await verifyWorksheet(client, sheetId, options.worksheet);
 
-  const readResponse = await sheets({ version: 'v4', auth: currentAuthClient }).spreadsheets.values.get({
-    spreadsheetId: sheetId,
-    valueRenderOption: 'FORMATTED_VALUE',
-    majorDimension: 'ROWS',
-    range,
-  });
+  const readResponse = await client.getValues(sheetId, range);
 
   if (readResponse.status !== 200 || !readResponse.data.values) {
     throw new Error(`Sheet read failed: ${readResponse.statusText}`);
@@ -429,14 +258,7 @@ export async function upload(sheetId: string, options: ImportMap) {
     throw new Error(`Sheet write failed to correctly parse rundown: ${e}`);
   }
 
-  const writeResponse = await sheets({ version: 'v4', auth: currentAuthClient }).spreadsheets.batchUpdate({
-    spreadsheetId: sheetId,
-    requestBody: {
-      includeSpreadsheetInResponse: false,
-      responseRanges: [range],
-      requests: updateRundown,
-    },
-  });
+  const writeResponse = await client.batchUpdate(sheetId, updateRundown, [range]);
 
   if (writeResponse.status === 200) {
     logger.info(LogOrigin.Server, `Sheet write ${writeResponse.statusText}`);
@@ -459,18 +281,15 @@ export async function download(
   customFields: CustomFields;
   summary: RundownSummary;
 }> {
-  if (!currentAuthClient) {
+  const authClient = authProvider.getAuthClient();
+  if (!authClient) {
     throw new Error('Not authenticated');
   }
+  const client = new GoogleSheetsClient(authClient);
 
-  const { range } = await verifyWorksheet(sheetId, options.worksheet);
+  const { range } = await verifyWorksheet(client, sheetId, options.worksheet);
 
-  const googleResponse = await sheets({ version: 'v4', auth: currentAuthClient }).spreadsheets.values.get({
-    spreadsheetId: sheetId,
-    valueRenderOption: 'FORMATTED_VALUE',
-    majorDimension: 'ROWS',
-    range,
-  });
+  const googleResponse = await client.getValues(sheetId, range);
 
   if (googleResponse.status !== 200) {
     throw new Error(`Sheet read failed: ${googleResponse.statusText}`);