Removed Guard
Added omniauth-facebook
Configured Devise initializer for omniauth
Re-installed spring, regenerated binstubs
Configured Devise for omniauth-facebook with correct call syntax to secrets.yml
Added provider and uid fields to User table
Configured User model to use Devise's omniauth module
Configured app, Devise to use Figaro (config/application.yml). Secret and vendor keys loaded from ENV
Facebook omniauth integration but need to work redirect page in