Get Instagram username by user ID

Resolves a numeric user_id to the account's current username, with a small profile stub (display name, avatar, verification). Useful for re-checking IDs you stored earlier, since usernames change but IDs do not.

curl -X GET "https://example.com/v3/instagram/user/username?user_id=25025320" \  -H "x-api-key: YOUR_API_KEY"

{  "data": {    "pk": "string",    "username": "string",    "property1": null,    "property2": null  }}