curl --request POST \
  --url https://your-instance.example.com/api/user/api-key/regenerate \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "message": "API key regenerated",
  "data": {
    "apiKey": "tk_live_7c2b3d8e21a9f6c2b3d8e21a9f6c2b3d8e21"
  }
}