Add username and password auth in addition to OAuth
While OAuth is becoming increasingly popular, username/password-based auth is still used widespread by many APIs and protocols (e.g., IMAP, CardDAV/CalDAV, etc.). In order to support as many services/APIs as possible with DTP, it should therefore be possible to use username/password-based auth schemes.
DTP seems to be centered around OAuth for authentication. While there seem to be some pieces of code that are using other Auth Schemes, it is unclear to me how to use it. Additionally, the demo UI currently does not support different auth schemes other than OAuth. I did not find documentation on this as well.
To me it looks like the CookiesAndUrlAuthData class used by Mastodon/Solid might be used for such auth schemes in the authentication adapters somehow. However, some classes seem to be missing for them to be actually usable (e.g. a non-OAuth subclass of AuthDataGenerator)?
Is someone already actively working on this issue? If not, can I be assigned to take it forward?