Currently, there is an IDMS authentication service from fivem ( https://idms.fivem.net/ ) which, as far as I know, can only be used from txadmin.
This authentication service looks like this: Imgur: The magic of the Internet
Use case:
E.g. in web pages as login or general authentication.
It would be nice to have something like this that is available to everyone!
Have a nice day!