Hosted Auth
Sign users in with a hosted Candle account grant.
Candle users should sign in through Hosted Auth. Hosted auth creates or finds
the global Candle account, unlocks the user's privacy material on candle.fi, asks the user to
approve your app, and returns an app-scoped grant to the SDK.
The old app-scoped createUser flow is legacy-only. Do not use it from public native, React
Native, Android, or web clients.