User can delete his own 2FA login history

src/data/user.rs

@@ -313,4 +313,11 @@ impl EntityManager<User> {
             user
         })
     }
+
+    pub fn clear_2fa_login_history(&mut self, id: &UserID) -> bool {
+        self.update_user(id, |mut user| {
+            user.last_successful_2fa = Default::default();
+            user
+        })
+    }
 }