diff --git a/enableuser.cpp b/enableuser.cpp
new file mode 100644
index 0000000..8b95d2d
--- /dev/null
+++ b/enableuser.cpp
@@ -0,0 +1,155 @@
+#include "Session.h"
+#include "Util.h"
+#include "json.hpp"
+#include "jsonfail.h"
+using namespace std;
+using json=nlohmann::json;
+
+#define postval(NAME) string NAME=req.post[#NAME]
+
+int main()
+{
+    Request req;
+    Session se(req);
+    Response res;
+    json j;
+
+    auto jsonfail=[&](int errcode,const string& detail="")
+    {
+        j["success"]=0;
+        j["errcode"]=errcode;
+        j["errmsg"]=string(GetErrMsg(errcode))+" : "+detail;
+    };
+
+    do
+    {
+        if(!se.isReady())
+        {
+            jsonfail(err_session);
+            break;
+        }
+
+        if(!se.getUser().empty())
+        {
+            /// Logged in. Redirect user to dashboard.
+            j["success"]=2;
+            j["next_url"]="/booksys/dashboard.html";
+            break;
+        }
+
+        if(req.requestMethod!="POST")
+        {
+            jsonfail(err_method_not_supported);
+            break;
+        }
+
+        if(req.post["account"].empty()||
+           req.post["realname"].empty() ||
+           req.post["realid"].empty() ||
+           req.post["realphone"].empty())
+        {
+            jsonfail(err_missing_parameter);
+            break;
+        }
+
+        postval(account);
+        postval(realname);
+        postval(realid);
+        postval(realphone);
+
+        /// Connect DB
+        DBInfo db;
+        MySQLConn conn;
+        if(db.readConfig()<0)
+        {
+            jsonfail(err_config);
+            break;
+        }
+
+        if(db.connectProxy(conn)<0)
+        {
+            jsonfail(err_connect);
+            break;
+        }
+
+        /// Check if user exist
+        int count_val;
+        if(conn.exec(make_str("select count(username) from bs_user where username='",
+                              account,
+                              "'"),
+                     [&](MySQLResult& res)
+                     {
+                         res.stepRow([&](char** val,unsigned long* len)
+                                     {
+                                         count_val=ParseInt(val[0]);
+                                    });
+                     })<0)
+        {
+            jsonfail(err_sql,"Step 1");
+            break;
+        }
+
+        if(count_val!=1)
+        {
+            jsonfail(err_data,"user not exist");
+            break;
+        }
+
+        /// Check if user need enable
+        int permission_level;
+        int account_status;
+        if(conn.exec(make_str("select permission_level,account_status from bs_user where username='",
+                              account,
+                              "'"),
+                     [&](MySQLResult& res)
+                     {
+                         res.stepRow([&](char** val,unsigned long* len)
+                                     {
+                                         permission_level=ParseInt(val[0]);
+                                         account_status=ParseInt(val[1]);
+                                    });
+                     })<0)
+        {
+            jsonfail(err_sql,"Step 2");
+            break;
+        }
+
+        if(permission_level!=3||account_status!=2)
+        {
+            /// Does not need enable
+            j["success"]=2;
+            j["errmsg"]="Enable is not needed";
+            break;
+        }
+
+        /// Do Update
+        if(conn.exec(make_str("insert into bs_reader values ('",
+                              account,
+                              "','",
+                              realname,
+                              "','",
+                              realid,
+                              "','",
+                              realphone,
+                              "',1,0,", /// LV, EXP
+                              "0,0,0,", /// Borrow Limit, Borrow Used, Borrow Time Limit (This should be auto generated by Trigger)
+                              "0,0)" /// Bonus, Balance
+                              ),nullptr)<0)
+        {
+            jsonfail(err_sql,"Step 3");
+            break;
+        }
+
+        if(conn.getAffectedRows()<1) /// FIXME: I'm not sure if trigger will affect more than 1 rows.
+        {
+            jsonfail(err_sql_logic,"Affected rows less than 1");
+            break;
+        }
+
+        j["successs"]=1;
+    }while(0);
+
+    res.content.append(j.dump());
+    res.show();
+    return 0;
+}