title: Amazon Cognito - UI Customizations - cannot use the HTTP protocol
body: <p>I'm using Amazon Cognito User pool to customize my UI for sign in and Log in. 
  From my understanding, Callback URL is the landing page after successful login.
  When I tried to configure my callback URL, I always get below error
  Trying to input call back URL as <a href="http://BUCKETName.s3-website-us-east-1.amazonaws.com/index.html" rel="noreferrer">http://BUCKETName.s3-website-us-east-1.amazonaws.com/index.html</a></p>
  
  <blockquote>
    <p>We were unable to update your App Configuration: <a href="http://BUCKETName.s3-website-us-east-1.amazonaws.com/index.html" rel="noreferrer">http://BUCKETName.s3-website-us-east-1.amazonaws.com/index.html</a> cannot use the HTTP protocol. (Service: AWSCognitoIdentityProviderService; Status Code: 400; Error Code: InvalidParameterException; Request ID: b3a888be-ded0-11e7-b16b-0fd6b04b4706)</p>
  </blockquote>
  
  <p>If I replace this with <a href="http://localhost/" rel="noreferrer">http://localhost/</a> then it works but it's of no use because can't use it in production. Amazon documentation doesn't provide much information on this. How do i make it work? Any idea?</p>