Hi, I installed gluu server and create an OpenID client for testing. I have added `password ` to `grant_type` and `token` to `response_type` and I have created a user using the admin account. But when I tried to get the token using postman, the server always returns 401 unauthorized error with details below: ``` { "error": "invalid_client", "error_description": "Client authentication failed (e.g. unknown client, no client authentication included, or unsupported authentication method). The authorization server MAY return an HTTP 401 (Unauthorized) status code to indicate which HTTP authentication schemes are supported. If the client attempted to authenticate via the Authorization request header field, the authorization server MUST respond with an HTTP 401 (Unauthorized) status code, and include the WWW-Authenticate response header field matching the authentication scheme used by the client." } ``` The post request I used is below (I hide the host) ``` POST /oxauth/restv1/token HTTP/1.1 Host: myapp.cloudapp.azure.com Content-Type: application/json cache-control: no-cache Postman-Token: ecad26eb-0970-4876-9d03-13b4c8d1833b { "grant_type": "password", "username": "user1", "password": "P@ss1234", "client_id": "@!4B9F.BF94.6496.AC5B!0001!DFBB.9D80!0008!64C0.F8C2.A55E.4069", "client_secret": "P@ss1234" } ``` Could someone help? Thanks in advance. Ches