curl --request GET \
  --url https://api.usezombie.com/v1/workspaces/{workspace_id}/credentials/llm \
  --header 'Authorization: Bearer <token>'

{
  "provider": "<string>",
  "has_key": true,
  "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}