@cfxlabsinc/b2b-services
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    CreatePasskeyStep: React.FC<
        {
            finish: SignInFormHandler;
            rememberAs?: string;
            returnToPath?: string
            | null;
            start: (returnToPath: string | null) => Promise<PasskeyCreationStart>;
        },
    > = ...

    The create-passkey step's button: start registers with Cognito (or goes on to a step that's owed instead), the browser makes the passkey, finish saves it and goes on. A closed prompt is the person's own choice, said plainly under the button rather than as an error.