Anilist graphql query

can anyone help me?

how to mutate graphql query to add manga to anilist manga favorite by current login user?

this is how i done it
favorite.php

<?php
session_start();
header("Content-Type: application/json");

// Check if access token is available
if (!isset($_SESSION['access_token'])) {
    echo json_encode(["error" => "Access token not found. Please log in first."]);
    exit;
}

// Get Manga ID from AJAX request
$data = json_decode(file_get_contents("php://input"), true);
if (!isset($data['mangaId'])) {
    echo json_encode(["error" => "No manga ID provided."]);
    exit;
}

$mangaId = (int) $data['mangaId'];

// AniList API URL
$url = "https://graphql.anilist.co";

// GraphQL Mutation Query
$query = <<<GQL
mutation ($mangaId: Int) {
  ToggleFavourite(mangaId: $mangaId) {
    manga {
      edges {
        node {
          id
          title {
            romaji
            english
          }
        }
      }
    }
  }
}
GQL;

// Prepare request payload
$variables = ["mangaId" => $mangaId];
$payload = json_encode(["query" => $query, "variables" => $variables]);

// Set headers
$headers = [
    "Content-Type: application/json",
    "Authorization: Bearer " . $_SESSION['access_token']
];

// Initialize cURL
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

// Execute request and get response
$response = curl_exec($ch);
curl_close($ch);

file_put_contents("debug_log.txt", $response . PHP_EOL, FILE_APPEND);
echo $response;
?>

button

<div id="favoriteButton" class="bookmark dropright favourite">
                                    <button class="btn btn-lg btn-secondary1 h-100" data-manga-id="<?php echo htmlspecialchars($manga['id']); ?>">
                                    <span>Favorites</span>
                                    <i class="fa-thin fa-heart"></i>
                                    </button>
                                 </div>

script

<script>
        document.getElementById("favoriteButton").addEventListener("click", function () {
            let mangaId = this.getAttribute("data-manga-id");

            fetch("favorite.php", {
                method: "POST",
                headers: {
                    "Content-Type": "application/json"
                },
                body: JSON.stringify({ mangaId: mangaId })
            })
            .then(response => response.json())
            .then(data => {
                if (data.errors) {
                    alert("Error: " + data.errors[0].message);
                } else {
                    alert("Manga successfully added to favorites!");
                }
            })
            .catch(error => console.error("Error:", error));
        });
    </script>

the reponse return success but when i go to my anilist account, the manga is not there in favourites

the reponse return success but when i go to my anilist account, the manga is not there in favourites