Replace `https://` protocol with `attc:` and remove redundant check

 * console.log(url.toString()); // "https://domain.com/@username"

 * ```

 */

function convertHandleToUrl(handle: string): URL {

function convertHandleToUrl(handle: string): string {

  const match = handle.match(HANDLE_REGEX); // Match the handle format

  if (!match) { // If the handle does not match,

    throw new InvalidHandleError(handle); // throw `Invalid handle format` error

  }

  const [, username, domain] = match; // Extract username and domain from the match

  if (!username || !domain) { // If username or domain is empty,

    throw new InvalidHandleError(handle); // throw `Invalid handle format` error

  }

  return new URL(`https://${domain}/@${username}`); // Create a URL object with the domain and username

  return `acct:${username}@${domain}`;

}