AuthClient raises UnboundLocalError in Dapla Lab

[mmwinther]

This prevents any access to files in GCS for Datadoc. It is possible that there is an underlying problem with infrastructure or configuration, but even if this is the case it should not result in an UnboundLocalError.

Calling code: https://github.com/statisticsnorway/datadoc/blob/288c41202a612c94a7e44d0e5e4a2d08eb615308/src/datadoc/backend/utils.py#L42

Traceback:

client = GSClient(credentials=AuthClient.fetch_google_credentials())
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File \"/usr/local/lib/python3.12/site-packages/dapla/auth.py\", line 136, in fetch_google_credentials
    return credentials
         ^^^^^^^^^^^
UnboundLocalError: cannot access local variable 'credentials' where it is not associated with a value

[RupinderKaurSSB]

Solved the issue in PR: #170