Fix current_resource_owner caching implementation

app/controllers/api/base_controller.rb

@@ -63,12 +63,13 @@ class Api::BaseController < ApplicationController
   end
 
   def current_resource_owner
-    return nil if cookies.signed['_session_id'].nil?
-    # return @current_user if doorkeeper_token.nil?
+    if doorkeeper_token
       @current_user ||= Rails.cache.fetch("dk:user:#{doorkeeper_token.resource_owner_id}", expires_in: 25.hours) do
         User.find(doorkeeper_token.resource_owner_id)
       end
     end
+    return @current_user
+  end
 
   def current_user
     current_resource_owner || super