title: Cannot test Cognito authenticated API Gateway call in Postman (its an ADMIN_NO_SRP_AUTH pool)
body: <p>I've managed to successfull login to the API gateway I've made via my iOS device and Cognito.  The problem is I'd like to use postman to test the API calls then implement them on the phone.  Currently, Postman cannot authenticate (despite AWS saying it can).  No matter what I do I get a 401 error (visible in the screen-shots)</p>
  
  <p>What I've tried</p>
  
  <p><strong>Downloaded the postman collection from AWS Api Gateway</strong>
  <a href="https://i.stack.imgur.com/NC9zT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NC9zT.png" alt="enter image description here"></a></p>
  
  <p><strong>Then imported it into postman, and switch the authentication to "AWS Signature"</strong>
  <a href="https://i.stack.imgur.com/DEZNK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DEZNK.png" alt="enter image description here"></a></p>
  
  <p><strong>And Here is a screen shot of the Postman Generated Header Info</strong>
  <a href="https://i.stack.imgur.com/Bydxa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Bydxa.png" alt="enter image description here"></a></p>