Support password-less login with WebAuthn (#5112)

* Support password-less login with WebAuthn

* Fix initial value of usePasswordLessLogin

src/server/api/endpoints/i/2fa/password-less.ts

@@ -0,0 +1,21 @@
+import $ from 'cafy';
+import define from '../../../define';
+import { UserProfiles } from '../../../../../models';
+
+export const meta = {
+	requireCredential: true,
+
+	secure: true,
+
+	params: {
+		value: {
+			validator: $.boolean
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	await UserProfiles.update(user.id, {
+		usePasswordLessLogin: ps.value
+	});
+});