add two factor apis

src/models/response/twoFactorU2fResponse.ts

@@ -0,0 +1,23 @@
+export class TwoFactorU2fResponse {
+    enabled: boolean;
+    challenge: Challenge;
+
+    constructor(response: any) {
+        this.enabled = response.Enabled;
+        this.challenge = new Challenge(response.Challenge);
+    }
+}
+
+class Challenge {
+    userId: string;
+    appId: string;
+    challenge: string;
+    version: string;
+
+    constructor(response: any) {
+        this.userId = response.UserId;
+        this.appId = response.AppId;
+        this.challenge = response.Challenge;
+        this.version = response.Version;
+    }
+}