> ## Documentation Index
> Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# createUserAccount

> Creates or updates the user account for the currently authenticated user. Idempotent: calling this multiple times with the same identity will update the existing account rather than creating a duplicate. Used during the initial onboarding flow to set the user's display names.