Issue with Dispatch in Cakephp 3.0

[ravikanthhtnakivar]

Hi,
when i convert this plugin into cakephp 3.0 with minimal changes,i got the following error.

⟩ Cake\Routing\Dispatcher->dispatch
ROOT\plugins\Opauth\src\Controller\OpauthAppController.php, line 129

**Error: Controller could not be found.
Error: Create the class Controller below in file: src\Controller\Controller.php