Improve the documentation for the configuration of the app

[kaiserls]

I think it would be very helpful to have an example how to set up django-invitations with a custom user model. https://django-invitations.readthedocs.io/en/latest/configuration.html

I can't provide a pull request because I didn't manage to get it running.

[valberg]

Hi @kaiserls - did you follow the installation instructions? https://django-invitations.readthedocs.io/en/latest/installation.html

[kaiserls]

Yes, however I struggled with configuring the custom user model with django-invitations and including it in the admin panel.

[Flimm]

It's not clear what issues you are running into. Could you clarify this, and reopen this issue?