userApiUrl(user: { id: string; } | { username: string; },...segments: string[]): string
Returns the URL of /api/users/:key, or of what is under it, segments
such as "dumps", slug, each encoded: every request about a user takes it
from here. The key is user's id, or, when the caller has only the name a
page's path gives, @ and that handle, which the API resolves as the page
would, a former name or a remote user's included.