export function generateVerificationCode() {
  const characters = '123456789abcdefghijkmnpqrstuvwxyABCDEFGHJKLMNPQRSTUVWXY';
  let code = '';
  for (let i = 0; i < 4; i++) {
    code += characters.charAt(Math.floor(Math.random() * characters.length));
  }
  return code;
}