app/models/user.rb in hackathon_manager-0.9.2 vs app/models/user.rb in hackathon_manager-0.10.0

@@ -1,10 +1,16 @@
 class User < ApplicationRecord
   devise :database_authenticatable, :registerable, :timeoutable,
          :recoverable, :rememberable, :trackable, :validatable,
-         :omniauthable, omniauth_providers: [:mlh]
+         :doorkeeper, :omniauthable, omniauth_providers: [:mlh]
 
   has_one :questionnaire
+  has_many :access_grants, class_name: "Doorkeeper::AccessGrant",
+                           foreign_key: :resource_owner_id,
+                           dependent: :delete_all # or :destroy if you need callbacks
+  has_many :access_tokens, class_name: "Doorkeeper::AccessToken",
+                           foreign_key: :resource_owner_id,
+                           dependent: :delete_all # or :destroy if you need callbacks
 
   after_create :queue_reminder_email
 
   def active_for_authentication?
     true