diff --git a/Api/Utility/TFA.cs b/Api/Utility/TFA.cs
new file mode 100644
index 0000000..8ba8cc7
--- /dev/null
+++ b/Api/Utility/TFA.cs
@@ -0,0 +1,33 @@
+namespace Milimoe.FunGame.Core.Api.Utility
+{
+    /// <summary>
+    /// aka 2FA
+    /// </summary>
+    public class TFA
+    {
+        private readonly Dictionary<string, string> TFACodes = new();
+
+        public virtual bool IsAvailable(string username)
+        {
+            return true;
+        }
+
+        public string GetTFACode(string username)
+        {
+            return TFACodes.ContainsKey(username) ? TFACodes[username] : Verification.CreateVerifyCode(Library.Constant.VerifyCodeType.MixVerifyCode, 5);
+        }
+
+        public bool Authenticate(string username, string code)
+        {
+            if (!IsAvailable(username)) return false;
+            if (TFACodes.ContainsKey(username) && TFACodes[username] == code)
+            {
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+    }
+}