Fix missing scopes for service account keys specified via GOOGLE_APPLICATION_CREDENTIALS (#448) (#449)

Author: dbalabka

dask_cloudprovider/gcp/instances.py

@@ -657,21 +657,24 @@ def __init__(self, service_account_credentials: Optional[dict[str, Any]] = None)
         self._compute = self.refresh_client()
 
     def refresh_client(self):
+
+        scopes = ["https://www.googleapis.com/auth/cloud-platform"]
+
         if self.service_account_credentials:
             import google.oauth2.service_account  # google-auth
 
             credentials = (
                 google.oauth2.service_account.Credentials.from_service_account_info(
                     self.service_account_credentials,
-                    scopes=["https://www.googleapis.com/auth/cloud-platform"],
+                    scopes=scopes,
                 )
             )
         else:
             import google.auth
 
             # Obtain Application Default Credentials (ADC)
             try:
-                credentials, _ = google.auth.default()
+                credentials, _ = google.auth.default(scopes)
             except google.auth.exceptions.DefaultCredentialsError as e:
                 raise GCPCredentialsError() from e