How to make Unity & PHP Login Logout and Register

<?php

$databasename = "mydatabase";
$host = "localhost";
$dbuser = "root";
$dbpassword = "";
$connection = mysqli_connect($host, $dbuser, $dbpassword, $databasename);

?>

<?php

include("config.php");

if(isset($_POST["newAccountUsername"])){
	$username = mysqli_real_escape_string($connection, $_POST["newAccountUsername"]);
	$password = mysqli_real_escape_string($connection, $_POST["newAccountPassword"]);
	//Check are they empty?
	if($username != "" && $password != ""){
		//Check is the username has not taken
		if(mysqli_num_rows(mysqli_query($connection, "SELECT * FROM unity_users WHERE username = '$username'")) == 0){
			mysqli_query($connection, "INSERT INTO unity_users (username, password) VALUES ('$username', '$password')");
			echo "Regitering new account: Username " . $username . " and password: " . $password;
		}else{
			echo "This Username is not available. Please use another username.";
		}		
	}else{
		echo "Both fields are required.";
	}
}else if(isset($_POST["loginUsername"])){
	$username = mysqli_real_escape_string($connection, $_POST["loginUsername"]);
	$password = mysqli_real_escape_string($connection, $_POST["loginPassword"]);
	if($username != "" && $password != ""){
		//Check are entered username and password matched
		$sql = "SELECT * FROM unity_users WHERE username = '$username' AND password = '$password'";
		if(mysqli_num_rows(mysqli_query($connection, $sql)) > 0){
			echo 1;
		}else{
			echo 0;
		}
	}else{
		echo "Both fields are required.";
	}
}else{
	echo "Unity Login Logout and Register";
}

?>

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;

public class UnityLoginLogoutRegister : MonoBehaviour
{
	
	public string baseUrl = "http://localhost/ThirteeNov/UnityLoginLogoutRegister/";
	
	
	public InputField accountUserName;
	public InputField accountPassword;
	public Text info;
	
	private string currentUsername;
	private string ukey = "accountusername";
	
    // Start is called before the first frame update
    void Start()
    {
        currentUsername = "";
		
		if(PlayerPrefs.HasKey(ukey)){
			if(PlayerPrefs.GetString(ukey) != ""){
				currentUsername = PlayerPrefs.GetString(ukey);
				info.text = "You are loged in = " + currentUsername;
			}else{
				info.text = "You are not loged in.";
			}
		}else{
			info.text = "You are not loged in.";
		}
		
    }

    // Update is called once per frame
    void Update()
    {
        
    }
	
	public void AccountLogout(){
		currentUsername = "";
		PlayerPrefs.SetString(ukey, currentUsername);
		info.text = "You are just loged out.";
	}
	
	public void AccountRegister()
    {
        string uName = accountUserName.text;
        string pWord = accountPassword.text;
        StartCoroutine(RegisterNewAccount(uName, pWord));
    }
	
	public void AccountLogin()
    {
        string uName = accountUserName.text;
        string pWord = accountPassword.text;
        StartCoroutine(LogInAccount(uName, pWord));
    }
	
	IEnumerator RegisterNewAccount(string uName, string pWord)
    {
        WWWForm form = new WWWForm();
        form.AddField("newAccountUsername", uName);
        form.AddField("newAccountPassword", pWord);
        using (UnityWebRequest www = UnityWebRequest.Post(baseUrl, form))
        {
            www.downloadHandler = new DownloadHandlerBuffer();
            yield return www.SendWebRequest();
 
            if (www.isNetworkError)
            {
                Debug.Log(www.error);
            }
            else
            {
                string responseText = www.downloadHandler.text;
                Debug.Log("Response = " + responseText);
                info.text = "Response = " + responseText;
            }
        }
    }
	
	IEnumerator LogInAccount(string uName, string pWord)
    {
        WWWForm form = new WWWForm();
        form.AddField("loginUsername", uName);
        form.AddField("loginPassword", pWord);
        using (UnityWebRequest www = UnityWebRequest.Post(baseUrl, form))
        {
            www.downloadHandler = new DownloadHandlerBuffer();
            yield return www.SendWebRequest();
 
            if (www.isNetworkError)
            {
                Debug.Log(www.error);
            }
            else
            {
                string responseText = www.downloadHandler.text;
				if(responseText == "1"){
					PlayerPrefs.SetString(ukey, uName);
					//info.text = "Login Success with username " + uName;
					SceneManager.LoadSceneAsync("Home");
				}else{
					info.text = "Login Failed.";
				}
            }
        }
    }
}