Viewer is enough
The standard read-only role suffices; no custom role definition is needed.
Check projects with the Viewer role
The connector reads a Google Cloud project via the REST APIs for Storage, Resource Manager, IAM, Compute and Logging. You store a service account with the Viewer role and its key file; the project ID comes from the file or is maintained explicitly. Reading only.
Vendor: Google · cloud.google.com/docs
The standard read-only role suffices; no custom role definition is needed.
Credentials are stored encrypted and are not displayed again after creation.
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