UnityWebRequest error connection API

[mohammed_amine_chehab]

I contact the Unity community to find a problem with my problem.
I want to make a connection to a php my admin
the passage on Unity failed me against a problem here is my code
Please how to fix!

Assets\c# scripts\ID_Login.cs(24,17): warning CS0618: 'UnityWebRequest.isNetworkError' is obsolete: 'UnityWebRequest.isNetworkError is deprecated. Use (UnityWebRequest.result == UnityWebRequest.Result.ConnectionError) instead.'

Assets\c# scripts\ID_Login.cs(24,39): warning CS0618: 'UnityWebRequest.isHttpError' is obsolete: 'UnityWebRequest.isHttpError is deprecated. Use (UnityWebRequest.result == UnityWebRequest.Result.ProtocolError) instead.'

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
public class ID_Login : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        StartCoroutine(Login("ahmed", "amine.chehab"));
    }

    IEnumerator Login(string username, string password)
    {
        WWWForm form = new WWWForm();
        form.AddField("LoginUser", username);
        form.AddField("LoginPass", password);


        using (UnityWebRequest www = UnityWebRequest.Get("http://localhost/unity_game_server/login.php", form))
        {
            yield return www.SendWebRequest();

            if (www.isNetworkError || www.isHttpError)
            {
                Debug.Log(www.error);
            }
            else
            {
                Debug.Log(www.downloadHandler.text);
            }
        }
    }
}

[Aurimas-Cernius]

Does your code even compile?
Get takes only one argument - the URL. Are you sure it isn’t Post that you want?

[Kurt-Dekker]

This is how to start debugging ALL network-related issues. Any other way is just guessing.

Networking, UnityWebRequest, WWW, Postman, curl, WebAPI, etc:

Using Unity for subscription lists

As with all network code, get it working with Postman or curl first. That makes it NOT a Unity problem. Solve the networking first. You must solve that or anything else is irrelevant. Once you have that working, then try and port it to UnityWebRequest. If it still doesn't work, one handy debug solution is to hook up a proxy like Charles and compare the functioning output from Postman / curl to the output from Unity, and from that reason about where your issues are.

Unity web request acting stupid.

Always get network stuff working outside of Unity in either curl or PostMan, then connect a proxy such as Charles and start trying to replicate the traffic shape with UnityWebRequest. Any other way risks wasting a lot of your time for trivial issues that only the above way will instantly reveal.

And setting up a proxy can be very helpful too, in order to compare traffic:

Using Charles Proxy with Unity