Get a course by id

{  "id": "string",  "title": "string",  "slug": "string",  "description": "string",  "status": "draft",  "category": "string",  "moduleCount": -9007199254740991,  "activityCount": -9007199254740991,  "enrolledCount": -9007199254740991,  "updatedAt": "string",  "createdAt": "string"}

{  "error": "string",  "message": "string"}