User Logins

[whereismyjetpack]

In order to make decisions at the application level we need to support user logins. (#819 ) We can do this via headers set from oauth2 proxy, or via an oauth2 strategy within the application. We've done both of these methods in the past. with the employee-directory app, and with scholarsphere. We'll need an login endpoint that sets a session for a user, ideally we'd get a users group (or role) information, and make decisions based off of the inclusion of that group (or role).

Since blacklight is largely a public application, user management probably shouldn't bubble up to the user, but we should make it fairly simple to login