Verify without LoginForm

[meteoDaniel]

Dear fief-Team,

I really like your porject and I started to dig deeper into it because I really need a User Management tool for our applications based upon FastAPI.

As far as I understand, Login is only possible via the LoginForm in the Browser.

fief/fief/apps/auth/routers/auth.py

Line 154 in 9c7e72e

form_helper = FormHelper(

So for me it would be very helpful to have one of the two options:

1. Login made available via query/header/cookies by passing E-Mail and Password to retrieve a Token
2. User can generate an Access Token in its User Profil similar to the way it works in the admin dashboard for the admin.

A possible solution can look like this:
https://fastapi.tiangolo.com/tutorial/security/simple-oauth2/

If you can tell me where to add a first guess, I can open-up a PR to support the dev of the feature.

[meteoDaniel]

PS: I have found a work around that will work for me so far. But really looking forward to have such feature in fief :)