app.post('/add_user', function(req, res){
  console.log("added");
  //console.log(req.body);
    //console.log(req.query.name1+req.query.email+req.query.password);

    //console.log(req.query.arr[0]+req.query.arr[1]+req.query.arr[2]);

    var username = req.body.firstname;
    var mail = req.body.email;
    var password = req.body.password;
    var obj={
      name:username,
      mail:mail,
      password:password,
      task:[],
      all:0,
      in:0,
      ar:0,
      c:0
    }

    var configFile = fs.readFileSync('./users.json');
    var config = JSON.parse(configFile);
    var found = false;
    for (var i=0 ; i < config.list.length ; i++) {
      if (config.list[i].mail == mail) {
        console.log("found");
        found=true;
      }
    }
    if (!found) {
      config.list.push(obj);
      var configJSON = JSON.stringify(config);
      fs.writeFileSync('./users.json', configJSON);

    }
    return found;
});