index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="description" content="Login or Create User">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="style.css">
  <title>Login or Create User</title>
</head>
<body>
  <h2>Login or Create User</h2>

  <!-- Login Form -->
  <form id="loginForm" method="POST" action="userNameCheck.php">
    <label for="username">Username:</label>
    <input type="text" id="username" name="username" required>
    <button type="submit">Login</button>
  </form>

  <!-- Create User Form -->
  <form id="createUserForm" method="POST" action="createUser.php">
    <label for="newUsername">New Username:</label>
    <input type="text" id="newUsername" name="newUsername" required>
    <button type="submit">Create User</button>
  </form>
</body>
</html>