text: // credentials box handlers
  
  const signUpButton = document.getElementById('signUp');
  const signInButton = document.getElementById('signIn');
  const container = document.getElementById('container');
  
  signUpButton.addEventListener('click', () => {
      container.classList.add("right-panel-active");
  });
  
  signInButton.addEventListener('click', () => {
      container.classList.remove("right-panel-active");
  });