authenticateWithPasskey
suspend fun SignIn.authenticateWithPasskey(allowedCredentialIds: List<String> = emptyList()): ClerkResult<SignIn, ClerkErrorResponse>
Authenticates this sign-in with a passkey.
If this sign-in requires a second factor and advertises passkey support, the existing sign-in is prepared and attempted as a second factor. Otherwise, this starts the existing first-factor passkey flow.