Firehose users

Hi team -  

So I added option under "Users" tab on the dashboard to list all users, and click a button to add user as a "Firehose Member".  Once this button is pressed, the user is automatically assigned all interviews.

Also, if a user is already a Firehose member, then the button is greyed out/disabled.  

This doesn't appear to be valid code (you have a `do` and no `end`).  Is this file actually triggered?  If it's no longer used might make sense to delete it.