title: Is it possible to get custom attributes on AWS Cognito sign up form?
body: <p>I am building an Alexa Skill that will implement Account Linking. When a user uses my skill, they would have to use the Alexa App to sign-in.</p>
  
  <p>The Authentication UI is set up and managed by Amazon Cognito so that I don’t have to host my own sign-in and sign-up UI for my Alexa application.</p>
  
  <p>My User Pool in Cognito has two standard and one custom attribute.</p>
  
  <p>The sign-up form (hosted by Cognito) includes text-fields for the standard attributes, but not for the custom attributes. I want text-fields for all attributes (standard and custom). I couldn't find any documentation that shows how to allow this. How do I do it?</p>
  
  <p><a href="https://i.stack.imgur.com/aG3yl.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/aG3yl.jpg" alt="I have two standard and one custom attributes. I need all of them from user."></a></p>
  
  <p><a href="https://i.stack.imgur.com/MreNO.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/MreNO.jpg" alt="But the sign up form is not showing the input field for custom attribute"></a></p>