Use access token to clone repo

[Frank]

Is your feature request related to a problem? Please describe.
Currently using --method http results in getting a question for username / password.
Within GitLab it is however possible to use the access token (assuming it has read_repository permissions) to clone the repo.

Describe the solution you'd like
Append the token to the URL

Describe alternatives you've considered
None

Additional context
Add any other context or screenshots about the feature request here.

[Erez Mazor]

Duplicate of #18

GitPython doesn't support this natively you can add a wrapper as described here

[NiMeDia]

In gitlab the username would be "oauth2" and the password would be the access token