diff --git a/user_mgr.hpp b/user_mgr.hpp
index 624b2ba..b69cb87 100644
--- a/user_mgr.hpp
+++ b/user_mgr.hpp
@@ -14,6 +14,7 @@
 // limitations under the License.
 */
 #pragma once
+#include "json_serializer.hpp"
 #include "users.hpp"
 
 #include <boost/process/child.hpp>
@@ -278,6 +279,11 @@
                                 bool skipSignal) override;
     bool secretKeyRequired(std::string userName) override;
     static std::vector<std::string> readAllGroupsOnSystem();
+    void load();
+    JsonSerializer& getSerializer()
+    {
+        return serializer;
+    }
 
   protected:
     /** @brief get pam argument value
@@ -441,6 +447,8 @@
     /** @brief object path */
     const std::string path;
 
+    /** @brief serializer for mfa */
+    JsonSerializer serializer;
     /** @brief privilege manager container */
     const std::vector<std::string> privMgr = {"priv-admin", "priv-operator",
                                               "priv-user"};
@@ -449,8 +457,8 @@
     std::vector<std::string> groupsMgr;
 
     /** @brief map container to hold users object */
-    using UserName = std::string;
-    std::unordered_map<UserName, std::unique_ptr<phosphor::user::Users>>
+
+    std::unordered_map<std::string, std::unique_ptr<phosphor::user::Users>>
         usersList;
 
     /** @brief get users in group