Laravel Auth Login by company name, username, and password

I like user to login by company name, username, and password - they need to enter all those fields.

username, and password fields are in the users table. 'company_name' are in the companies table.

username can be duplicated in the users table but each username is belong to different company name. company_id is defined in users table.

How can I Auth against company name, username, and password?

I had a look at the attemptLogin() method.

 protected function attemptLogin(Request $request)
    {
        return $this->guard()->attempt(
            $this->credentials($request), $request->has('remember')
        );
    }

I can't override this because I need to pass specific user that is belong to company then do auth check.

via Chebli Mohamed