Crypto-DAPP-ConnectMetaMask.js

  // connectMetaMask is used to connect to MetaMask and ask permission to grab account information
  function connectMetaMask() {
    // We need to make the connection to MetaMask work.
    // Send Request for accounts and to connect to metamask.
    window.web3.requestAccounts()
    .then((result) => {
      // Whenever the user accepts this will trigger
      setAccounts(result);
    })
    .catch((error) => {
      // Handle errors, such as when a user does not accept
      throw new Error(error);
    });
  };