Swift: Start passkey authentication

Fetches assertion options to authenticate with a passkey.

• Does not require an existing session.
• Pass the returned options (W3C PublicKeyCredentialRequestOptions) to the platform authenticator.
• After running the authenticator, submit the result with verifyPasskeyAuthentication(challengeId:credentialResponse:).

Examples

Get passkey authentication options

// @_spi(Experimental) import Supabase
let options: PasskeyAuthenticationOptions = try await supabase.auth.getPasskeyAuthenticationOptions()
// Hand options.options to the platform authenticator.