Trying Google Apis (Server-to-server) but gives 401 error, even after assigning permissions to the service account. #3606

import { GoogleAuth } from "google-auth-library";
import fetch from "node-fetch";

// Path to your service account JSON key file
const serviceAccountPath = "./firebase_service_account_key.json";

// Initialize the GoogleAuth client with the service account key and required scope
const authClient = new GoogleAuth({
  keyFile: serviceAccountPath,
  scopes: ["https://www.googleapis.com/auth/androidpublisher"],
});

const getAccessToken = async () => {
  const client = await authClient.getClient();
  const { token } = await client.getAccessToken();
  if (!token) throw new Error("Failed to retrieve access token");
  return token;
};

const callPlayDeveloperAPI = async (packageName, subscriptionId, token) => {
  try {
    const accessToken = await getAccessToken();

    const url = `https://androidpublisher.googleapis.com/androidpublisher/v3/applications/${packageName}/purchases/subscriptions/${subscriptionId}/tokens/${token}`;
    console.log("Request URL:", url);

    const response = await fetch(url, {
      method: "GET",
      headers: {
        Authorization: `Bearer ${accessToken}`,
      },
    });

    if (!response.ok) {
      const errorData = await response.json();
      console.error("Error Response:", JSON.stringify(errorData));
      throw new Error(
        `Request failed with status ${response.status}: ${errorData.error.message}`
      );
    }

    const data = await response.json();
    console.log("Subscription Data:", JSON.stringify(data));
  } catch (error) {
    console.error("Failed to call Play Developer API:", error);
  }
};

// Replace with actual values
const packageName = "com.myexample.app";
const subscriptionId = "xyz_tag";
const token = "my_token";

// Call the function to make the API request
callPlayDeveloperAPI(packageName, subscriptionId, token).catch(console.error);