Laravel Passport 密码授予 客户端身份验证失败

Check your credentials first if they are correct, Secondly check your model table which uses \Laravel\Passport\HasApiTokens trait that whether it contains email column, because by default it is used to identify user when validating credentials. if your table has username column or any other column which is used in validating credentials you must define a function findForPassport in that model. like this,

public function findForPassport($username) {
       return self::where('username', $username)->first(); // change column name whatever you use in credentials
    }

I use username and password column to validate a user, in {project_directory}\vendor\laravel\passport\src\Bridge\UserRepository.php

此函数用于验证您的凭据，

public function getUserEntityByUserCredentials($username, $password, $grantType, ClientEntityInterface $clientEntity)
    {
        if (is_null($model = config('auth.providers.users.model'))) {
            throw new RuntimeException('Unable to determine user model from configuration.');
        }

        if (method_exists($model, 'findForPassport')) { // if you define the method in that model it will grab it from there other wise use email as key 
            $user = (new $model)->findForPassport($username);
        } else {
            $user = (new $model)->where('email', $username)->first();
        }

        if (! $user || ! $this->hasher->check($password, $user->password)) {
            return;
        }

        return new User($user->getAuthIdentifier());
    }

notice the second if statement and you will get to know what is happening there.

希望这对您有所帮助:)