fix: SAML client count

Author: sattvikc

src/main/java/io/supertokens/storage/postgresql/Start.java

@@ -4538,4 +4538,13 @@ public void removeExpiredSAMLCodesAndRelayStates() throws StorageQueryException
             throw new StorageQueryException(e);
         }
     }
+
+    @Override
+    public int countSAMLClients(TenantIdentifier tenantIdentifier) throws StorageQueryException {
+        try {
+            return SAMLQueries.countSAMLClients(this, tenantIdentifier);
+        } catch (SQLException e) {
+            throw new StorageQueryException(e);
+        }
+    }
 }

src/main/java/io/supertokens/storage/postgresql/queries/SAMLQueries.java

@@ -407,4 +407,18 @@ public static void removeExpiredSAMLCodesAndRelayStates(Start start) throws Stor
             pst.setLong(1, expiredBefore);
         });
     }
+
+    public static int countSAMLClients(Start start, TenantIdentifier tenantIdentifier) throws StorageQueryException, SQLException {
+        String QUERY = "SELECT COUNT(*) as c FROM " + getConfig(start).getSAMLClientsTable()
+                + " WHERE app_id = ? AND tenant_id = ?";
+        return execute(start, QUERY, pst -> {
+            pst.setString(1, tenantIdentifier.getAppId());
+            pst.setString(2, tenantIdentifier.getTenantId());
+        }, result -> {
+            if (result.next()) {
+                return result.getInt("c");
+            }
+            return 0;
+        });
+    }
 }