Send an email to the user when a recording is done processing

Had to add an email attribute to users to store their email to send the
notification. Will only send it for user rooms since they are the only
ones we know who to notify.

app/models/user.rb

@@ -21,6 +21,7 @@ class User < ApplicationRecord
   def self.from_omniauth(auth_hash)
     user = find_or_initialize_by(uid: auth_hash['uid'], provider: auth_hash['provider'])
     user.username = self.send("#{auth_hash['provider']}_username", auth_hash) rescue nil
+    user.email = self.send("#{auth_hash['provider']}_email", auth_hash) rescue nil
     user.name = auth_hash['info']['name']
     user.save!
     user
@@ -30,10 +31,18 @@ class User < ApplicationRecord
     auth_hash['info']['nickname']
   end
 
+  def self.twitter_email(auth_hash)
+    auth_hash['info']['email']
+  end
+
   def self.google_username(auth_hash)
     auth_hash['info']['email'].split('@').first
   end
 
+  def self.google_email(auth_hash)
+    auth_hash['info']['email']
+  end
+
   def room_url
     "/rooms/#{encrypted_id}"
   end