AWS Appsync GraphQL fetcher using HTTP fetch

appsync-fetcher.ts

export const createGqlClient = (authToken: string, API: string) => (async (query) => {
    if (!authToken) {
      throw "Invalid Auth Token passed";
    }

    if (!API) {
      throw "Invalid API URL passed";
    }

    const response = await fetch(`https://${API}/graphql`, {
      body: JSON.stringify({ query }),
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Authorization: authToken,
      },
    });

    if (response.status === 401) {
        // handle unauthorized request
      }
    }
    if (!response.ok) {
      return new Promise((resolve, reject) => {
        response
          .text()
          .then((text) => {
            try {
              reject(JSON.parse(text));
            } catch (err) {
              reject(text);
            }
          })
          .catch(reject);
      });
    }

    const json = await response.json();

    return json.data;
  });