title: Cannot access Apache Airflow web UI when enabling authenticate = True
body: <p>I have apache airflow running perfectly fine with default settings, when I set     authenticate = False  in the the airflow.cfg file </p>
  
  <p>But I am unable to access the Web UI when i set authenticate = True
  I am following the instructions from the website 
  <a href="https://incubator-airflow.readthedocs.io/en/latest/security.html" rel="nofollow noreferrer">https://incubator-airflow.readthedocs.io/en/latest/security.html</a></p>
  
  <p>I am using Version : 1.10.1</p>
  
  <p>When i try to access web ui, I get the message
  This site can’t be reached  or too many redirects</p>
  
  <h1>airflow.cfg  file</h1>
  
  <p>[webserver]</p>
  
  <pre><code>authenticate = True
  auth_backend = airflow.contrib.auth.backends.password_auth
  </code></pre>
  
  <h1>Create my user with python</h1>
  
  <pre><code>import airflow
  from airflow import models, settings
  from airflow.contrib.auth.backends.password_auth import PasswordUser
  user = PasswordUser(models.User())
  user.username = 'my.user'
  user.email = 'my.user@company.com'
  user.password = 'password'
  session = settings.Session()
  session.add(user)
  session.commit()
  session.close()
  exit()
  </code></pre>
  
  <h1>restart airflow</h1>