[keycloak-user] Resource sharing using Keycloak

Hi, I am new to keycloak. I am trying to do resources sharing using Permission Management feature in Protection API. The resource server is accessed from a public client app(keycloak public client). But using the token issued to the client app, I am not able to do resource sharing from my resource server. It is throwing following error. {"error":"invalid_clientId","error_description":"Client application [CALL-CENTER-UI] is not registered as a resource server."} Please find my code below, PermissionTicketRepresentation permissionTicketRepresentation = new PermissionTicketRepresentation(); permissionTicketRepresentation.setRequester( "5cb1f43c-d28c-457f-9491-b358f63a8362"); permissionTicketRepresentation.setRequesterName("vishnu"); permissionTicketRepresentation.setOwner("albin"); permissionTicketRepresentation.setResource( "0fb7bfe1-78de-46eb-9e75-4632a67d1afb"); permissionTicketRepresentation.setResourceName("Pro-02-05091019"); permissionTicketRepresentation.setScope("project:view"); permissionTicketRepresentation.setScopeName("project:view"); permissionTicketRepresentation.setGranted(true); AuthzClient.create().protection(token).permission().create(permissionTicketRepresentation); Is to possible to share resources between users without using “Keycloak account app”. Any help will be appreciated. Thanks & Regards, Vishnu Prakash