diff --git a/src/client.py b/src/client.py
index 7c6794c..e752ec8 100644
--- a/src/client.py
+++ b/src/client.py
@@ -81,7 +81,7 @@ def createClientBlueprint(wireguardConfigurations: dict[WireguardConfiguration],
             if session.get('username') is None:
                 return ResponseObject(False, "Sign in status is invalid", status_code=401)
             session['totpVerified'] = True
-        
+            # return ResponseObject(True, data=)
         return ResponseObject(status, msg)
     
     @client.get(prefix)
diff --git a/src/modules/DashboardClients.py b/src/modules/DashboardClients.py
index bbb10ba..5b50dbf 100644
--- a/src/modules/DashboardClients.py
+++ b/src/modules/DashboardClients.py
@@ -57,6 +57,7 @@ class DashboardClients:
                 ).where(
                     self.dashboardClientsTable.c.DeletedDate is None)
                 ).mappings().fetchall()
+        
 
     def SignIn(self, Email, Password) -> tuple[bool, str]:
         if not all([Email, Password]):
@@ -85,6 +86,8 @@ class DashboardClients:
             totpMatched = pyotp.TOTP(data.get('TotpKey')).verify(UserProvidedTotp)
             if not totpMatched:
                 return False, "TOTP is does not match"
+            else:
+                self.DashboardClientsTOTP.RevokeToken(Token)
         if data.get('TotpKeyVerified') is None:
             with self.engine.begin() as conn:
                 conn.execute(
@@ -94,12 +97,9 @@ class DashboardClients:
                         self.dashboardClientsTable.c.ClientID == data.get('ClientID')
                     )
                 )
+              
         return True, None
-    
-                  
-                
         
-    
     def SignUp(self, Email, Password, ConfirmPassword) -> tuple[bool, str] or tuple[bool, None]:
         try:
             if not all([Email, Password, ConfirmPassword]):
@@ -141,4 +141,7 @@ class DashboardClients:
             self.logger.log(Status="false", Message=f"Signed up failed, reason: {str(e)}")
             return False, "Signed up failed."
             
-        return True, None       
\ No newline at end of file
+        return True, None
+    
+    def UpdatePassword(self, CurrentPassword, NewPassword, ConfirmNewPassword):
+        pass
\ No newline at end of file
diff --git a/src/modules/DashboardClientsTOTP.py b/src/modules/DashboardClientsTOTP.py
index dbb9884..e3830fb 100644
--- a/src/modules/DashboardClientsTOTP.py
+++ b/src/modules/DashboardClientsTOTP.py
@@ -39,9 +39,22 @@ class DashboardClientsTOTP:
                     "ExpireTime": datetime.datetime.now() + datetime.timedelta(minutes=10)
                 })
             )
-        
         return token
     
+    def RevokeToken(self, Token) -> bool:
+        try:
+            with self.engine.begin() as conn:
+                conn.execute(
+                    self.dashboardClientsTOTPTable.update().values({
+                        "ExpireTime": datetime.datetime.now()
+                    }).where(
+                        self.dashboardClientsTOTPTable.c.Token == Token
+                    )
+                )
+        except Exception as e:
+            return False
+        return True
+    
     def GetTotp(self, token: str) -> tuple[bool, dict] or tuple[bool, None]:
         with self.engine.connect() as conn:
             totp = conn.execute(