sign in user when token is fetched

app/controllers/api/user_token_controller.rb

@@ -1,5 +1,8 @@
 class Api::UserTokenController < Knock::AuthTokenController
+  include Oath::ControllerHelpers
+
   skip_before_action :verify_authenticity_token
+  before_action :sign_in_user
 
   rescue_from Exception, :with => :return_error
 
@@ -10,7 +13,7 @@ class Api::UserTokenController < Knock::AuthTokenController
     logger.error "==Handled======="
     logger.error exception.message
     logger.error exception.backtrace.join("\n")
-    logger.error "==Handled=======" 
+    logger.error "==Handled======="
     case exception
     when ActiveRecord::RecordNotFound
       @status = 404
@@ -27,12 +30,18 @@ class Api::UserTokenController < Knock::AuthTokenController
     end
 
     # for some reason render json_errors is not working
-    # simulating JSON API support 
-    render json: { 
+    # simulating JSON API support
+    render json: {
       errors: [{
         status: @status.to_s,
         title: @message
       }]
     }
   end
+
+  private
+
+  def sign_in_user
+    sign_in(entity)
+  end
 end