title: Auth0 how to send email as username
body: <p>After I upgraded Auth0 from version 9 to version 11, I face a problem while authenticating.</p>
  
  <p>I have a request URL: <a href="https://my-domain.auth0.com/co/authenticate" rel="nofollow noreferrer">https://my-domain.auth0.com/co/authenticate</a>, and all the parameters in my request look good, except username. It sends truncated email as username parameter, i.e. if I type 'someone@gmail.com', it only sends 'someone' as username.</p>
  
  <pre><code>export class AuthService {
  idToken: string;
  lock = new Auth0Lock(myConfig.clientID, myConfig.domain, {
        responseType: 'id_token token',
           .........
        params: {
  ---------------&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; if I write here:
            username: 'someone@gmail.com',
  ---------------&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; then it sends this email as username parameter, 
  no matter what I type in the login form. 
  IS THERE A WAY TO WRITE SOMETHING LIKE username: 'email' (this one is not working)
        }
    }
  });
  </code></pre>
  
  <p>Is there a way to send the full email as username?</p>