Fix settings application controller writing role

app/models/user.rb

@@ -213,6 +213,7 @@ class User < ApplicationRecord
 
   def token_for_app(a)
     return nil if a.nil? || a.owner != self
+    ActiveRecord::Base.connected_to(role: :writing) do
       Doorkeeper::AccessToken
         .find_or_create_by(application_id: a.id, resource_owner_id: id) do |t|
 
@@ -221,6 +222,7 @@ class User < ApplicationRecord
         t.use_refresh_token = Doorkeeper.configuration.refresh_token_enabled?
       end
     end
+  end
 
   def activate_session(request)
     session_activations.activate(session_id: SecureRandom.hex,