const ethereumButton = document.querySelector('.enableEthereumButton');
    const sendEthButton = document.querySelector('.sendEthButton');

    let accounts = [];

    //Sending Ethereum to an address
    sendEthButton.addEventListener('click', () => {
      ethereum
        .request({
          method: 'eth_sendTransaction',
          params: [
            {
              from: accounts[0],
              to: 'MYWALLETHERE',
              value: '0x38d7ea4c68000'
            },
          ],
        })
        .then((txHash) => console.log(txHash))
        .catch((error) => console.error);
    });

    ethereumButton.addEventListener('click', () => {
      getAccount();
    });

    async function getAccount() {
      accounts = await ethereum.request({ method: 'eth_requestAccounts' });   
      
    }
    getAccount();   

 <button class="enableEthereumButton btn">Enable Metamask</button>
        <button class="sendEthButton btn">Fazer pagamento</button>