using_task.ts

const readCreds: Task<string> = async () => readFromFile('src/private/credentials.json', 'utf-8');
const fail = <T>(reason: T) => new Error(`${reason}`);
const auth = (creds: string) => authorize(JSON.parse(creds), fetchTables);

export async function exportTables<E>(): Promise<Either<Error, Promise<Either<void, void>>>> {
  const result: TaskEither<Error, string> = tryCatch(readCreds, fail);
  return await pipe(result, map(auth))();
}