Laravel 6 OAuth令牌认证失败

Question

每当我需要帮助时，我都会在stackoverflow中找到所有问题，但是我仍然找不到解决方案。

我将laravel 6和护照8用于oauth，我将在http://localhost/oauth/token上访问令牌

此oauth /令牌

我使用客户密码 我认为这就是问题所在，但我不确定。

我的注册码

public function register(Request $request)
{
    $validator = Validator::make($request->all(), [
        'name' => 'required',
        'username' => 'required',
        'email' => 'required|email',
        'password' => 'required',
        'confirm_password' => 'required|same:password',
    ]);
    if ($validator->fails()) {
        return response()->json(['error'=>$validator->errors()], 401);
    }
    $input = $request->all();
    $input['password'] = Hash::make($input['username'].$input['password']);
    $user = User::create($input);
    $success['token'] =  $user->createToken('MyApp')-> accessToken;
    $success['name'] =  $user->name;
    return response()->json(['success'=>$success], $this-> successStatus);
}

我尝试了stackoverflow之类的功能

这是我的模型/用户

private $user_password;

/**
 * Find the user instance for the given username.
 *
 * @param  string  $username
 * @return \App\Model\User
 */
public function findForPassport($username)
{
    $user = $this->where('username', $username)->first();
    $this->user_password = $user->username.$user->password;
    return $user;
}

/**
 * Validate the password of the user for the Passport password grant.
 *
 * @param  string  $password
 * @return bool
 */
public function validateForPassportPasswordGrant($password)
{
    return Hash::check($this->user_password, $this->password);
}

/**
 * Get the password for the user.
 *
 * @return string
 */
public function getAuthPassword()
{
    return $this->user_password;
}

此文件config / auth.php

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

        'api' => [
            'driver' => 'passport',
            'provider' => 'users',
            'hash' => true,
        ],
    ],