Merge branch 'g406273-raise-error-missing-token' into 'master'

Adds error handling when empty PAT is provided

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/117329



Merged-by: Chloe Liu <yliu@gitlab.com>
Approved-by: Chloe Liu <yliu@gitlab.com>
Approved-by: Valerie Burton <vburton@gitlab.com>
Reviewed-by: Chloe Liu <yliu@gitlab.com>
Co-authored-by: Richard Chong <rchong@gitlab.com>