curl --request GET \
  --url https://api.hq.zone/v1/oauth/register/{client_id}

{
  "client_id": "<string>",
  "client_id_issued_at": 123,
  "client_name": "<string>",
  "grant_types": [
    "<string>"
  ],
  "redirect_uris": [
    "<string>"
  ],
  "registration_client_uri": "<string>",
  "response_types": [
    "<string>"
  ],
  "scope": "<string>",
  "token_endpoint_auth_method": "<string>",
  "client_secret": "<string>",
  "client_secret_expires_at": 123,
  "registration_access_token": "<string>"
}