請教一下各位前輩，
我現在在寫一個網站，目前使用者成功登入後，
能將使用者登入帳號顯示於我的網站的每個分頁中，
但我想顯示的是我DataBase中使用該帳號登入的使用者姓名，想請教一下該怎麼做？
懇請大家幫個忙
這是我的middleware

app.use((req, res, next) => {
  
  res.locals.renderData = {
    loginUser: req.session.loginUser,
  };
  next();
});
//首頁
app.get("/", (req, res) => {
  const data = res.locals.renderData;
  res.render("home",data);
});

這是我的登入

app.get("/login", (req, res) => {
  const data = res.locals.renderData;
  if (req.session.flashMsg) {
    data.flashMsg = req.session.flashMsg;
    delete req.session.flashMsg;
  }
  res.render("login", data);
});
app.post('/login', (req, res)=>{

  db.query("SELECT * FROM `med_basic_info` WHERE `ID`=? AND `password`=SHA1(?)",
      [req.body.user, req.body.password],
      (error, results, fields)=>{
          // console.log(results); // debug
          
          if(! results.length){
              req.session.flashMsg = {
                  type: "danger",
                  msg: "帳號或密碼錯誤"
              };
          } 
          
          else {
              console.log(req.session);
              req.session.loginUser = req.body.user;
              req.session.flashMsg = {
                  type: "success",
                  msg: "登入成功"
              };
          }
          res.redirect('/login');
      });
});