Verifies a challenge for a factor.
supabase.gotrue.mfa.verifyChallenge(
factorId = "34e770dd-9ff9-416c-87fa-43b31d7ef225",
challengeId = "4034ae6f-a8ce-4fb5-8ee5-69a5863a7c15",
code = "123456",
saveSession = true // this is set to true by default, but you can set it to false if you want to handle the session yourself
)