Support Per-Repository Deploy Tokens

[luqmana]

Hey, thanks for writing this extension first of all!

I had one suggestion: currently you require a PAT to grab the repo from Gitlab. But this requires a specific user creating the PAT, Gitlab also support per-repository Deploy Tokens which provide read access to the repository (scope: read_repository).

Thanks

[himanshush13]

I am also trying to fetch a repo from a private GITLAB, while creating a service connection it is giving an error- Error Message: 'Error while copying content to a stream.'