How do I get a user's MyFitnessPal username from user_id?

Call the Athlete endpoint to get the provider-side username from a Terra user_id

Call the Athlete endpoint to get the provider-side username from a Terra user_id:

GET /v2/athlete?user_id=<TERRA_USER_ID>

Include your dev-id and x-api-key headers. In the response, the provider_user_id field is the provider-side username (for MyFitnessPal, the MFP username).

To verify the user's diary/sharing, visit myfitnesspal.com/food/diary/<MFP_USERNAME>:

• If food entries show, sharing is configured correctly.

• Otherwise, the user must update their sharing settings.