I am totally stuck here in Drupal 8 REST API, any help is very appriciate.


I am using Drupal 8.3.x, simple_auth module to generate Auth token for REST. When I try to create user by Authorization Bearer then its not working but when I try to create by Basic Auth then it works fine. I also enabled permission for user REST.

See Permission for user resource: URL: admin/config/services/rest/resource/entity%3Auser/edit enter image description here

Postman Data:

Request header:
Authorization:Bearer token_value

enter image description here

In Error Log:
League\OAuth2\Server\Exception\OAuthServerException: The resource owner or authorization server denied the request. in League\OAuth2\Server\Exception\OAuthServerException::accessDenied() (line 165 of /var/www/html/d8/drupal-8-composer/vendor/league/oauth2-server/src/Exception/OAuthServerException.php).

1 Answer 1


I resolved my problem by giving user creation permission to anonymous user. "Access POST on User registration resource"

enter image description here

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