无法在laravel中进行身份验证

Question

I have this error in Laravel latest for authentication

Argument 2 passed to Illuminate\Auth\SessionGuard::__construct() must be an instance of Illuminate\Contracts\Auth\UserProvider, null given, called in G:\xampp\htdocs ewrestaurantcrm\vendor\laravel\framework\src\Illuminate\Auth\AuthManager.php

can anyone give me an idea about this error why this error is occurring? I am using below code for authentication in my Auth\AuthController.php file

protected function login(Request $request) {
    $email = $request->email;
    $password = bcrypt($request->password);
    if (Auth::login(['email' => $email, 'password' => $password])) {
        return redirect()->intended('/admin/dashboard');
    }
}

Answer 1

When you are authenticate user against email and password then use Auth::attempt or Auth::once (For single request). When we have user instance and we want to login with that user instance then we use Auth::login. For your case use Auth::attempt like this

public function login(Request $request) {
    $email = $request->email;
    $password = bcrypt($request->password);
    if (Auth::attempt(['email' => $email, 'password' => $password])) {
        return redirect()->intended('/admin/dashboard');
    }
}

Details: https://laravel.com/docs/5.6/authentication#included-authenticating