title: Error msg : {"code":"BadRequest","message":"The server did not understand the operation that was requested.","type":"client"}
body: <p>I am trying to get the list of userpools in aws cognito this error code arrises </p>
  
  <p>Host URL: <a href="https://cognito-idp.us-east-1.amazonaws.com/ListUserPools?Version=2016-04-18" rel="nofollow noreferrer">https://cognito-idp.us-east-1.amazonaws.com/ListUserPools?Version=2016-04-18</a></p>
  
  <p>I am using postman it calculates aws signature correctly so no problem in that...</p>
  
  <p>AWS ListUserPools : <a href="https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_ListUserPools.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_ListUserPools.html</a></p>
  
  <p>Where to place that request syntax on the documentation link ????</p>