To justify having 4 people working on the backend, we might want to read up on implementing our own login system. This area could get expanded like crazy, adding in support for password resets, and fancy stuff like Google Authentication (TOTP).
We definitely want support for other login systems like Google+, Facebook, and Twitter as well. We can use goth for this, which simplifies the interfaces significantly.
To justify having 4 people working on the backend, we might want to read up on implementing our own login system. This area could get expanded like crazy, adding in support for password resets, and fancy stuff like Google Authentication (TOTP).