AuthController:

protected function validator(array $data)
    {

        $accountType = AccountType::find($data['account_type_id']);


        if($accountType->name === "employer"){
            return Validator::make($data, [
                //employer validation
            ]);
        }else{
            return Validator::make($data, [
     //candidate validation
                ...
            ]);
        }

    }

    /**
     * Create a new user instance after a valid registration.
     *
     * @param  array  $data
     * @return User
     */
    protected function create(array $data)
    {

        // Check type of account
        $accountType = AccountType::find($data['account_type_id']);


        if($accountType->name === "employer"){

            //employer create


        }else{

            //Candidate user create

        }


        return $user;
    }