chore: Sentry issues (#4623)

Fixes various issues reported on sentry

- Twilio channel creation validation errors
- Room Channel error with nil class
- Webhook Uri exception

app/channels/room_channel.rb

@@ -45,6 +45,8 @@ class RoomChannel < ApplicationCable::Channel
   end
 
   def current_account
+    return if current_user.blank?
+
     @current_account ||= if @current_user.is_a? Contact
                            @current_user.account
                          else