Get a repository installation for the authenticated app

type Github = {

  token: string;

};

/**

 * Get a repository installation for the authenticated app

 * Enables an authenticated GitHub App to find the repository's installation information. The installation's account type will be either an organization or a user account, depending which account the repository belongs to.

You must use a [JWT](https://docs.github.com/apps/building-github-apps/authenticating-with-github-apps/#authenticating-as-a-github-app) to access this endpoint.

 */

export async function main(auth: Github, owner: string, repo: string) {

  const url = new URL(

    `https://api.github.com/repos/${owner}/${repo}/installation`

  );

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Bearer " + auth.token,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}