Function createTotpChallengeToken

createTotpChallengeToken(userId: string): Promise<string>
Creates a short-lived JWT for the post-password TOTP login challenge.
Parameters
- userId: string
  Authenticated user id pending second factor.
Returns Promise<string>
Signed JWT with purpose: 'totp-challenge'.
- Defined in lib/auth/totp-jwt.ts:10