<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello Page</title>
</head>
<body>
    <form method='post' action={{ url_for('login') }}>
        <p>
        <input type='text' name='username' />
    </p>
        <p>
        <button type='submit'>Submit</button>
    </p>
    </form>
</body>
</html>