Profile

Authenticated user profile + score + password.

📄️Get current user profile

Returns identity attributes (email, name, picture, language) and a derived `joined` timestamp (first swipe, or first wave start as fallback).

📄️Get lifetime score

Lifetime aggregate score for the current user. Sums `wave_scores` when present; falls back to counting `swipes` joined via `template_assignments`.

📄️Change password (authenticated)

Verifies the old password via Cognito, then sets the new password as permanent.