Java integration
curl \ -H "Authorization: $API_KEY" \ http://cognito-idp.us-east-1.amazonaws.com/#X-Amz-Target=AWSCognitoIdentityProviderService.SignUp
curl \ -H "Authorization: $API_KEY" \ http://cognito-idp.us-east-1.amazonaws.com/#X-Amz-Target=AWSCognitoIdentityProviderService.GetUser