title: What should be correct autocomplete for username = email?
body: <p>I see <a href="https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#autofilling-form-controls%3A-the-autocomplete-attribute" rel="noreferrer">in the standard</a> that I can have <code>autocomplete</code> either equal to <code>username</code> or <code>email</code> on an input field.</p>
  
  <p>In my case, username is actually the user's email.</p>
  
  <p>What is the best <code>autocomplete</code> to use on my username <code>input</code> field in this case to maximize compatibility with password managers?</p>