Support for service_account.Credentials is not yet supported in OperationsRestAsyncTransport which was added in googleapis/python-api-core#700.
The reason that it was not included in googleapis/python-api-core#700 is because it is not yet supported in google-auth. service_account.py exists here but there is no async version
Support for
service_account.Credentialsis not yet supported inOperationsRestAsyncTransportwhich was added in googleapis/python-api-core#700.The reason that it was not included in googleapis/python-api-core#700 is because it is not yet supported in
google-auth.service_account.pyexists here but there is no async version