List User Websites

Returns the websites that a user has access to within your organization, either via organization membership (implicit access to all websites in the org) or via explicit website membership. Organization membership takes precedence — if the user is an org member, all non-paused websites in your organization are returned with access_type: "organization". Otherwise, only websites the user has an explicit website_members row for are returned. Returns 404 if the user_id does not match any AthenaHQ user. Returns 200 with an empty websites array if the user exists but has no access within your organization (this intentionally does not distinguish “user is in a different org” from “user is in your org but has no access”). Requires a global API key.