Added IAM base path

Author: annahileta

launcher-csharp/appsettings.example.json

@@ -17,6 +17,7 @@
     "AdminApiEndpoint": "https://api-d.docusign.net/management",
     "MaestroApiEndpoint": "https://apps-d.docusign.com/api/maestro",
     "WebFormsBasePath": "https://apps-d.docusign.com/api/webforms/v1.1",
+    "IamBasePath": "https://api-d.docusign.com/v1",
     "CodeExamplesManifest": "https://raw.githubusercontent.com/docusign/code-examples-csharp/master/manifest/CodeExamplesManifest.json",
     "SignerEmail": "{SIGNER_EMAIL}",
     "SignerName": "{SIGNER_NAME}",
@@ -33,4 +34,4 @@
   },
   "AllowedHosts": "*",
   "quickstart": "{QUICKSTART_VALUE}"
-}
+}