MFA support

lib/classes/LoginError.ts

@@ -0,0 +1,17 @@
+export class LoginError extends Error
+{
+    public reason: string;
+    public message_id: string;
+
+    public constructor(err: {
+        login: 'false',
+        reason: string,
+        message: string,
+        message_id: string
+    })
+    {
+        super(err.message);
+        this.reason = err.reason;
+        this.message_id = err.message_id;
+    }
+}