[Feature] Add an option to hide password authentication when OAuth is enabled

[mhlas7]

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

Add an additional configuration option to allow for hiding the username and password field when OAuth is enabled. I only want my users to authenticate with my OAuth provider and never be presented with the option to enter a username and password.

FYI I am working on implementing this and will post a pull request soon. I don't contribute to GitHub projects often so apologies in advance! Happy to discuss further.