Laravel 5.1 AuthController contains 5 abstract methods and must therefore be declared abstract or implement the remaining methods

I have deleted the vendor folder and recreated it using composer install yesterday and it was working fine (probably cached). Today I'm facing this error.

FatalErrorException in AuthController.php line 84: Class enterglobe\Http\Controllers\Auth\AuthController contains 5 abstract methods and must therefore be declared abstract or implement the remaining methods (enterglobe\Http\Controllers\Auth\AuthController::toArray, enterglobe\Http\Controllers\Auth\AuthController::getKey, enterglobe\Http\Controllers\Auth\AuthController::getTable, ...)

I tried deleting it and installing, also composer dump-autoload also cleared composer cached files to install another version of laravel but with no success.

The error disappears if i just implement the methods on this class for example

public function toArray(){}
public function getKey() 
etc...

Error goes away from AuthController but then it appears in other controllers.

Anyone faced this before.

via Chebli Mohamed