Users

Method	Path	Notes
GET	/v0/users/me	Profile (displayName, fullName, handle read-only, avatar metadata)
PATCH	/v0/users/me	Update displayName / fullName (no bio)
GET	/v0/users/search	Handle lookup for messaging recipients

Avatar bytes use /v0/media/users/... — see Media uploads.

GET /v0/auth/session remains the lightweight auth check; prefer /users/me for profile fields.

Related: Resolve handles here, then send threads via Messaging.