Android Studio Log/Reg system password problem (MySQL/PHP) [closed]

I have a problem with user registration, and login. All registered users have same hash value in database, but when I was creating account I set different values.

When I try to login, I enter email address and some random value for password and login is successful.

Database table users image

Register function:

private void Regist(){
    loading.setVisibility(View.VISIBLE);
    btn_regist.setVisibility(View.GONE);

    final String name = this.name.getText().toString().trim();
    final String email = this.email.getText().toString().trim();
    final String password = this.password.getText().toString().trim();

    StringRequest stringRequest = new StringRequest(Request.Method.POST, URL_REGIST,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {

                    try {
                        JSONObject jsonObject = new JSONObject(response);
                        String success = jsonObject.getString("success");

                        if(success.equals("1")){
                            Toast.makeText(RegisterActivity.this, "Register success."+password, Toast.LENGTH_SHORT).show();
                        }

                    } catch (JSONException e){
                        e.printStackTrace();
                        Toast.makeText(RegisterActivity.this, "Register error." +e.toString(), Toast.LENGTH_SHORT).show();
                        loading.setVisibility(View.GONE);
                        btn_regist.setVisibility(View.VISIBLE);
                    }
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(RegisterActivity.this, "Register error." +error.toString(), Toast.LENGTH_SHORT).show();
                    loading.setVisibility(View.GONE);
                    btn_regist.setVisibility(View.VISIBLE);
                }
            })
    {
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("name", name);
            params.put("email", email);
            params.put("password", password);
            return params;
        }
    };

    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(stringRequest);

}

Register PHP Code:

<?php
if ($_SERVER['REQUEST_METHOD'] =='POST'){
$name = $_POST['name'];
$email = $_POST['email'];
$password = $_POST['password'];

$password = md5($password);

require_once '../server/connect.php';

$sql = "INSERT INTO users_table (name, email, password) VALUES ('$name', '$email', '$password')";

if ( mysqli_query($conn, $sql) ) {
    $result["success"] = "1";
    $result["message"] = "success";

    echo json_encode($result);
    mysqli_close($conn);

} else {

    $result["success"] = "0";
    $result["message"] = "error";

    echo json_encode($result);
    mysqli_close($conn);
}
}
?>

Login function:

private void Login(String email, String password){
    loading.setVisibility(View.VISIBLE);
    btn_login.setVisibility(View.GONE);

    StringRequest stringRequest = new StringRequest(Request.Method.POST, URL_LOGIN, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject jsonObject = new JSONObject(response);
                String success = jsonObject.getString("success");
                JSONArray jsonArray = jsonObject.getJSONArray("login");

                if(success.equals("1")){
                    for(int i = 0; i < jsonArray.length(); i++){
                        JSONObject object = jsonArray.getJSONObject(i);

                        String name = object.getString("name").trim();
                        String email = object.getString("email").trim();
                        String id = object.getString("id").trim();

                        sessionManager.createSession(name, email, id);

                        Toast.makeText(LoginActivity.this, "Welcome back: "+name+" Email:"+email+" ID: "+id, Toast.LENGTH_SHORT).show();

                        Intent intent = new Intent(LoginActivity.this, HomeActivity.class);
                        intent.putExtra("name", name);
                        intent.putExtra("email", email);
                        startActivity(intent);

                        loading.setVisibility(View.GONE);

                    }
                }
            } catch (JSONException e){
                e.printStackTrace();
                loading.setVisibility(View.GONE);
                btn_login.setVisibility(View.VISIBLE);
                Toast.makeText(LoginActivity.this, "Error: "+e.toString(), Toast.LENGTH_SHORT).show();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            loading.setVisibility(View.GONE);
            btn_login.setVisibility(View.VISIBLE);
            Toast.makeText(LoginActivity.this, "Error: "+error.toString(), Toast.LENGTH_SHORT).show();
        }
    })
    {
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("email", email);
            params.put("password", password);
            return params;
        }
    };

    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(stringRequest);

}

Login PHP Code:

<?php
if ($_SERVER['REQUEST_METHOD']=='POST') {
$email = $_POST['email'];
$password = $_POST['password'];

require_once '../server/connect.php';

$sql = "SELECT * FROM users_table WHERE email='$email' ";

$response = mysqli_query($conn, $sql);

$result = array();
$result['login'] = array();

if ( mysqli_num_rows($response) === 1 ) {
    
    $row = mysqli_fetch_assoc($response);

    if (md5($password) == $row['password'] ) {
        
        $index['name'] = $row['name'];
        $index['email'] = $row['email'];
        $index['id'] = $row['id'];

        array_push($result['login'], $index);

        $result['success'] = "1";
        $result['message'] = "success";
        echo json_encode($result);

        mysqli_close($conn);

    } else {

        $result['success'] = "0";
        $result['message'] = "error";
        echo json_encode($result);

        mysqli_close($conn);

    }
}
}
?>