verifyChallenge 
  abstract suspend fun verifyChallenge(factorId: String, challengeId: String, code: String, saveSession: Boolean = true): UserSession(source)
Verifies a MFA challenge
Parameters
factorId 
The id of the MFA factor to verify
challengeId 
The id of the challenge to verify
code
The code to verify
saveSession 
Whether to save the session after verification in GoTrue