async function connectToMetaMask() {
  if (!isMetaMaskInstalled()) {
    alert('MetaMask is not installed. Please install it to continue.');
    return;
  }

  try {
    const accounts = await ethereum.request({ method: 'eth_requestAccounts' });
    return accounts[0]; // Assuming the user selects the first account.
  } catch (error) {
    console.error('Error connecting to MetaMask:', error);
  }
}

document.getElementById('metamaskLogin').addEventListener('click', async () => {
  const account = await connectToMetaMask();
  if (account) {
    authenticateUser(account);
  }
});