I'm trying to fetch a spreadsheet with Google SDK. I'm logged into an account with a Service Account Token Creator role and the service account has access rights to the spreadsheet. This is my code:

def build_gcp_sheets_service():
    target_scopes = ['https://www.googleapis.com/auth/spreadsheets.readonly']

    source_credentials, _ = google.auth.default()

    target_credentials = impersonated_credentials.Credentials(
        source_credentials=source_credentials,
        target_principal=config.gcp.local_service_account,
        target_scopes=target_scopes,
        lifetime=60
    )

    service = build('sheets', 'v4', credentials=target_credentials)
    return service


service = build_gcp_sheets_service()

sheet = service.spreadsheets()
request = sheet.values().get(spreadsheetId=file_id, range=sheet_range)
result = request.execute() # Error occurs here

Calling request.execute() results in this error:

Traceback (most recent call last):
  File "/aircraft-detection/ml/gcp.py", line 69, in _fetch_spreadsheet
    result = request.execute()
             ^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/googleapiclient/_helpers.py", line 130, in positional_wrapper
    return wrapped(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/googleapiclient/http.py", line 923, in execute
    resp, content = _retry_request(
                    ^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/googleapiclient/http.py", line 191, in _retry_request
    resp, content = http.request(uri, method, *args, **kwargs)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/google_auth_httplib2.py", line 207, in request
    self.credentials.before_request(self._request, method, uri, request_headers)
  File "/usr/local/lib/python3.11/site-packages/google/auth/credentials.py", line 228, in before_request
    self._blocking_refresh(request)
  File "/usr/local/lib/python3.11/site-packages/google/auth/credentials.py", line 191, in _blocking_refresh
    self.refresh(request)
  File "/usr/local/lib/python3.11/site-packages/google/auth/credentials.py", line 365, in refresh
    self._refresh_token(request)
  File "/usr/local/lib/python3.11/site-packages/google/auth/impersonated_credentials.py", line 289, in _refresh_token
    self._source_credentials._refresh_token(request)
TypeError: 'str' object is not callable

I suspect that something is wrong with my gcloud configuration, not the code, because:

• This code used to work in the past and the error started to occur despite no changes in the code.

• The code works on other machines (other developers)

I reinstalled gcloud sdk and configured it again but it didn't help.