from gcore import Gcore

client = Gcore(
    api_key="My API Key",
)
registry_user_list = client.cloud.registries.users.list(
    registry_id=0,
    project_id=0,
    region_id=0,
)
print(registry_user_list.count)

{
  "count": 1,
  "results": [
    {
      "created_at": "2024-06-18T09:36:53.335000Z",
      "duration": 14,
      "expires_at": "2024-06-18T09:36:53.335000Z",
      "id": 1,
      "name": "user1",
      "read_only": false
    }
  ]
}