Adding an easy login to simplify logging in as a default user

[phyzical]

Adds logic to allow an admin to enable "easy login", when enabled it will let you choose a user to be logged in as when choosing the default login option.

Idea behind this is to use this when running behind another layer of authentication, i.e authelina or behind a vpn.

So basically just removes the need for and usernames or passwords for general users

[phyzical]

Happy to change the wording around "easy" if theres a better term you can think of

[github-actions[bot]]

This pull request has merge conflicts. Please resolve the conflicts so the PR can be successfully reviewed and merged.

[gauthier-th]

Don't you think “default login” would be clearer than “easy login”?