Classic ASP
Amazon Cognito - Admin Update User Attributes

Updates the specified user's attributes, including developer attributes, as an administrator. Works on any user.
For custom attributes, you must prepend the custom: prefix to the attribute name.
In addition to updating user attributes, this API can also be used to mark phone and email as verified.
Chilkat Classic ASP Downloads

Classic ASP
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

set rest = Server.CreateObject("Chilkat.Rest")

set authAws = Server.CreateObject("Chilkat.AuthAws")
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"
' Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = "us-west-2"
authAws.ServiceName = "cognito-idp"
' SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
success = rest.SetAuthAws(authAws)

' URL: https://cognito-idp.us-west-2.amazonaws.com/
bTls = 1
port = 443
bAutoReconnect = 1
' Use the same region as specified above.
success = rest.Connect("cognito-idp.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "ConnectFailReason: " & rest.ConnectFailReason) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( rest.LastErrorText) & "</pre>"
    Response.End
End If

' Use this online tool to generate code from sample JSON:
' Generate Code to Create JSON

' The following JSON is sent in the request body.

' {
'     "UserAttributes": [
'          {
'            "Name": "email_verified",
'            "Value": "true"
'          },
'          {
'            "Name": "email",
'            "Value": "matt@example.com"
'          }
'        ],
'      "UserPoolId": "us-west-2_yt6WzO3SA",
'      "Username": "Matt"
' }
' 

set json = Server.CreateObject("Chilkat.JsonObject")
success = json.UpdateString("UserAttributes[0].Name","email_verified")
success = json.UpdateString("UserAttributes[0].Value","true")
success = json.UpdateString("UserAttributes[1].Name","email")
success = json.UpdateString("UserAttributes[1].Value","matt@example.com")
success = json.UpdateString("UserPoolId","us-west-2_yt6WzO3SA")
success = json.UpdateString("Username","Matt")

success = rest.AddHeader("Content-Type","application/x-amz-json-1.0")
success = rest.AddHeader("X-Amz-Target","AWSCognitoIdentityProviderService.AdminUpdateUserAttributes")
success = rest.AddHeader("Accept-Encoding","identity")

set sbRequestBody = Server.CreateObject("Chilkat.StringBuilder")
success = json.EmitSb(sbRequestBody)
set sbResponseBody = Server.CreateObject("Chilkat.StringBuilder")
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( rest.LastErrorText) & "</pre>"
    Response.End
End If

respStatusCode = rest.ResponseStatusCode
Response.Write "<pre>" & Server.HTMLEncode( "response status code = " & respStatusCode) & "</pre>"
If (respStatusCode <> 200) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Response Status Code = " & respStatusCode) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "Response Header:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( rest.ResponseHeader) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "Response Body:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( sbResponseBody.GetAsString()) & "</pre>"
    Response.End
End If

set jsonResponse = Server.CreateObject("Chilkat.JsonObject")
success = jsonResponse.LoadSb(sbResponseBody)

jsonResponse.EmitCompact = 0
Response.Write "<pre>" & Server.HTMLEncode( jsonResponse.Emit()) & "</pre>"

' If successful, the response status code is 200, and the response body is empty JSON "{}"

%>
</body>
</html>