title: Updating Cognito "User Pools" or "Federated Identities" is not working
body: <p>I created a cognito user pool with some apps and attributes. All is empty, it has no user yet.</p>
  
  <p>Now, I want to add some new attributes in "Atributes" tab, but all fields are disabled.</p>
  
  <p>On the other hand, in Federated Policies, i was trying to change the "user pool id" and "client id", under tab "Authentication Provider" > "Cognito". All fine, I do my changes and I press "Save Changes", but when I refresh the page to see it, i see that my changes was lose.</p>
  
  <p>My question is, is a bug of Cognito, or updating attributes/configuration is not supported?</p>
  
  <h1>EDIT 1: OK, it's not possible to update an attributes.</h1>
  
  <h1>EDIT 2: I can't update configuration on Identity Pool. Here is my steps:</h1>
  
  <ol>
  <li>Go to federated identities
  <a href="https://i.stack.imgur.com/6De2v.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6De2v.png" alt="enter image description here"></a></li>
  <li>Press edit identity pool
  <a href="https://i.stack.imgur.com/54zqo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/54zqo.png" alt="enter image description here"></a></li>
  <li>In authentication provider, in cognito tab, unloock user pool id and app client id
  <a href="https://i.stack.imgur.com/sGO2d.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sGO2d.png" alt="enter image description here"></a></li>
  <li>Update values and press Save Changes
  <a href="https://i.stack.imgur.com/4wwfn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4wwfn.png" alt="enter image description here"></a></li>
  <li>System show me that changes was successfully saved
  <a href="https://i.stack.imgur.com/rrSx1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rrSx1.png" alt="enter image description here"></a></li>
  <li>Go to Authentication Provider, under Cognito, but still appears old values
  <a href="https://i.stack.imgur.com/MOO6e.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MOO6e.png" alt="enter image description here"></a></li>
  <li>Check if Pool Id and App Client Id was correct
  <a href="https://i.stack.imgur.com/zkDk0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zkDk0.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/GKfi7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GKfi7.png" alt="enter image description here"></a></li>
  </ol>
  
  <p>Thanks</p>