curl --request POST \
  --url https://api.cnap.tech/v1/workspaces/{id}/members \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user_id": "user_abc123",
  "role": "member"
}
'

{
  "error": {
    "code": "not_found",
    "message": "Resource not found",
    "param": "name",
    "suggestion": "Run `cnap clusters list` to see available clusters",
    "details": "<unknown>"
  }
}