title: How do i enable "cognito user pool" option in app client settings through terraform?
body: <p>I am able to specify "Facebook" in the "supported_identity_providers" argument and it works. I tried specifying the name, id and the word "Cognito User Pool" for the supported identity providers argument and it keeps throwing validation error.</p>
  
  <p><a href="https://i.stack.imgur.com/Q0YIX.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Q0YIX.png" alt="enter image description here"></a></p>
  
  <p>I want the option pointed by the arrow enabled from terraform. What value do I pass to the  "supported_identity_providers" argument?</p>