Backup Service CLI does not allow for passing in GCP refresh_token

What's happening?

When attempting to create a CBBS GCP repository through the CLI using --cloud-credentials-id and --cloud-credentials-key, GCP auth fails with:

'credentials are not valid: refresh_token is required'

There is no option to pass in this refresh_token, making static creds unusable here

What's expected?

I expect there to be an option to pass in the refresh_token

Steps to reproduce

1. Set up a node with backup service
2. Attempt to add a GCP CBBS repo through the CLI e.g.

• /opt/couchbase/bin/couchbase-cli backup-service -c 10.112.212.101:8091 -u Administrator -p password repository --add --id new-repository --backup-archive gs://testrunner-gcp-jmj-test/test-arcihve --plan _daily_backups --cloud-staging-dir /tmp/test-staging --cloud-credentials-id REDACTED --cloud-credentials-key REDACTED

• Should see the following error:

• ERROR: {'status': 400, 'msg': 'credentials are not valid: refresh_token is required'}