Auth::Attempt(username,password) doesn't work

I am really new to laravel but had experience using PHP, I have this problem with the Auth::attempt() method. It seems that even thought $request->get() gets the value the attempt method doesn't work. I tried checking my Database Table using Schema::hasTable and yes it exists. I am not using the email and password instead I am using a username and password for the login.

LoginController.php

class LoginController extends Controller
{
    public function login(){
        return view('pages.login');
    }

    public function dashboard(){
        return view('pages.dashboard');
    }

public function checklogin(Request $request)
{
    $rules = array(
        'Username'    => 'required|string|min:5',
        'Password' => 'required|min:6'
    );

    $validator = Validator::make($request->all(), $rules);

    if ($validator->fails()) {
        return Redirect::to('/login')
            ->withErrors($validator) // send back all errors to the login form
            ->withInput($request->except('Password')); // send back the input (not the password) so that we can repopulate the form
    }else{
        $userdata = array(
            'Password'  => $request->get('Password'),
            'Username'     => $request->get('Username')
        );
        if (Auth::attempt($userdata,true)) {

            // validation successful!
            echo 'SUCCESS!';
            echo  Auth::user()->FirstName;
        } else {

            // validation not successful, send back to form
            echo "ERROR!";
        }

    }
    //Just checking if the value was really been posted
    echo $request->get('username').$request->get('password');
}

public function logout()
{
 Auth::logout();
 return redirect('/');
}
}

Here is the model I created

UsersInfo.php

use Illuminate\Database\Eloquent\Model;
use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Auth\Authenticatable as AuthAuthenticatable;

class UsersInfo extends Model implements Authenticatable
{
    use AuthAuthenticatable;

    protected $table = 'UsersInfo';

    public $primaryKey = 'id';

    protected $fillable = [
        'Username','Password','MobileNum','AccountNum','FirstName','LastName','Address'
    ];
    public function getAuthPassword(){
        return $this->Password;
      }
}

auth.php

    <?php

return [

    

    'defaults' => [
        'guard' => 'web',
        'passwords' => 'UsersInfo',
    ],

    

    'guards' => [
        'web' => [
            'driver' => 'session',
            'provider' => 'UsersInfo',
        ],

        'api' => [
            'driver' => 'token',
            'provider' => 'UsersInfo',
            'hash' => false,
        ],
    ],

    

    'providers' => [
        'Users' => [
            'driver' => 'eloquent',
            'model' => App\User::class,
        ],
        'UsersInfo' => [
            'driver' => 'eloquent',
            'model' => App\UsersInfo::class,
        ],

        // 'users' => [
        //     'driver' => 'database',
        //     'table' => 'users',
        // ],
    ],

    

    'passwords' => [
        'UsersInfo' => [
            'provider' => 'UsersInfo',
            'table' => 'password_resets',
            'expire' => 60,
            'throttle' => 60,
        ],
    ],

    

    'password_timeout' => 10800,

];