Supports cloning repositories by http with auth

[linniksa]

• add config file that stores secret key
• store encoded user/pass in extra_info
• https://git-scm.com/docs/gitcredentials

[TrumanRu]

Am I correctly understanding - after this feature will be commited this plugin will connect to private GitLab projects via http(s)?

Looking forward to it.

[laborb-sb]

I would also be very happy about the feature! However, I think the way of authentication via Gitlab Personal Access Tokens is more convenient. If I may just suggest that. Then you don't have to handle SSH Key Secrets.
https://oauth2:[Gitlab Personal Access Tokens]@gitlab.example.com

By the way, at https://github.com/phlegx/redmine_gitlab_hook this works (but the plugin is no longer actively maintained and not compatible with 4.x).

[sharpSteff]

I'm also struggling with not be able to pass credentials via http.
just:
http://username:password@mygitserver/myrepo.git

would be so great