Definition
Web Authentication: An API for accessing Public Key Credentials - Level 3 defines PublicKeyCredentialRequestOptionsJSON
dictionary PublicKeyCredentialRequestOptionsJSON {
required Base64URLString challenge;
unsigned long timeout;
DOMString rpId;
sequence<PublicKeyCredentialDescriptorJSON> allowCredentials = [];
DOMString userVerification = "preferred";
sequence<DOMString> hints = [];
AuthenticationExtensionsClientInputsJSON extensions;
};