Android Question Restful API service

const sql = require("./db.js");

// constructor
const custloc = function(cust) {
this.first_name  = cust.first_name;
this.last_name = cust.last_name;
this.country_code = cust.country_code;
this.mobile = cust.mobile;
this.email = cust.email;
this.created_user_id = cust.created_user_id;
this.created_time = cust.created_time;
this.updated_user_id = cust.updated_user_id;
this.updated_time = cust.updated_time;
this.is_active = cust.is_active;
this.pw = cust.pw;
};

custloc.create = (newcustloc, result) => {
  sql.query("INSERT INTO customers SET ?", newcustloc, (err, res) => {
    if (err) {
      console.log("error: ", err);
      result(err, null);
      return;
    }

    console.log("created cust: ", { id: res.insertId, ...newcustloc });
    result(null, { id: res.insertId, ...newcustloc });
  });
};

custloc.findById = (id, result) => {
  sql.query(`SELECT * FROM customers WHERE id = ${id}`, (err, res) => {
    if (err) {
      console.log("error: ", err);
      result(err, null);
      return;
    }

    if (res.length) {
      console.log("found cust: ", res[0]);
      result(null, res[0]);
      return;
    }

    // not found custloc with the id
    result({ kind: "not_found" }, null);
  });
};

custloc.getAll = result => {
  sql.query("SELECT * FROM customers", (err, res) => {
    if (err) {
      console.log("error: ", err);
      result(null, err);
      return;
    }

    console.log("custs: ", res);
    result(null, res);
  });
};

custloc.updateById = (id, cust, result) => {
    
  sql.query(
    "UPDATE customers SET first_name = ? , last_name = ? , country_code = ? , mobile = ? , email = ? , created_user_id = ? , created_time = ? , updated_user_id = ? , updated_time = ? , is_active = ? , pw = ? WHERE id = ?",
    [cust.first_name, cust.last_name, cust.country_code , cust.mobile , cust.email , cust.created_user_id, cust.created_time , cust.updated_user_id, cust.updated_time , cust.is_active , cust.pw ,id],
    (err, res) => {
      if (err) {
        console.log("error: ", err);
        result(null, err);
        return;
      }

      if (res.affectedRows == 0) {
        // not found custloc with the id
        result({ kind: "not_found" }, null);
        return;
      }

      console.log("updated cust: ", { id: id, ...cust });
      result(null, { id: id, ...cust });
    }
  );
};

custloc.remove = (id, result) => {
  sql.query("DELETE FROM customers WHERE id = ?", id, (err, res) => {
    if (err) {
      console.log("error: ", err);
      result(null, err);
      return;
    }

    if (res.affectedRows == 0) {
      // not found custloc with the id
      result({ kind: "not_found" }, null);
      return;
    }

    console.log("deleted cust with id: ", id);
    result(null, res);
  });
};

custloc.removeAll = result => {
  sql.query("DELETE FROM customers", (err, res) => {
    if (err) {
      console.log("error: ", err);
      result(null, err);
      return;
    }

    console.log(`deleted ${res.affectedRows} custs`);
    result(null, res);
  });
};

module.exports = custloc;

    j.PostString("http://192.168.1.12:3000/customers", str)
    j.GetRequest.SetHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0")
    j.GetRequest.SetContentType("application/json")
    j.GetRequest.Timeout=60
    j.GetRequest.SetContentEncoding("UTF8")

Job.GetRequest.SetContentType("application/json")

Sub AddCustomer
    Dim Job As HttpJob
    Try
        Dim Map1 As Map
        Map1.Initialize
        Map1.Put("email", "ali@adil.com")
        Map1.Put("name", "Ali Adil")
        Map1.Put("active", True)
        Dim gen As JSONGenerator
        gen.Initialize(Map1)
        Dim jsn As String
        jsn = gen.ToString
        Log(jsn)
                    
        Job.Initialize("", Me)
        Job.PostString("http://172.20.10.3:3000/customers", jsn)
        Job.GetRequest.SetContentType("application/json")
        Wait For (Job) JobDone(Job As HttpJob)
        ProgressDialogHide
        If Job.Success Then
            Log(Job.GetString)
        Else
            Log(Job.ErrorMessage)
            Job.Release
        End If
    Catch
        Job.Release
        LogColor("Error: " & LastException.Message, Colors.Red)
    End Try
End Sub