(Delphi ActiveX) Amazon Cognito - List Users

See more Amazon Cognito Examples

Lists the users in the Amazon Cognito user pool.

For more information, see https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_ListUsers.html

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: TChilkatRest;
success: Integer;
authAws: TChilkatAuthAws;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
json: TChilkatJsonObject;
sbRequestBody: TChilkatStringBuilder;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
jsonResponse: TChilkatJsonObject;
Enabled: Integer;
UserCreateDate: WideString;
UserLastModifiedDate: WideString;
UserStatus: WideString;
Username: WideString;
j: Integer;
count_j: Integer;
Name: WideString;
Value: WideString;
i: Integer;
count_i: Integer;

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

rest := TChilkatRest.Create(Self);

authAws := TChilkatAuthAws.Create(Self);
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
rest.SetAuthAws(authAws.ControlInterface);

// 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
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(rest.ConnectFailReason));
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// Note: The above code does not need to be repeatedly called for each REST request.
// The rest object can be setup once, and then many requests can be sent.  Chilkat will automatically
// reconnect within a FullRequest* method as needed.  It is only the very first connection that is explicitly
// made via the Connect method.

// The following JSON is sent in the request body.

// {
//     "UserPoolId": "us-west-2_yt6WzO3SA"
// }
// 

json := TChilkatJsonObject.Create(Self);
json.UpdateString('UserPoolId','us-west-2_yt6WzO3SA');

rest.AddHeader('Content-Type','application/x-amz-json-1.0');
rest.AddHeader('X-Amz-Target','AWSCognitoIdentityProviderService.ListUsers');
rest.AddHeader('Accept-Encoding','identity');

sbRequestBody := TChilkatStringBuilder.Create(Self);
json.EmitSb(sbRequestBody.ControlInterface);
sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('POST','/',sbRequestBody.ControlInterface,sbResponseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;
respStatusCode := rest.ResponseStatusCode;
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(rest.ResponseHeader);
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(sbResponseBody.GetAsString());
    Exit;
  end;

jsonResponse := TChilkatJsonObject.Create(Self);
jsonResponse.LoadSb(sbResponseBody.ControlInterface);

jsonResponse.EmitCompact := 0;
Memo1.Lines.Add(jsonResponse.Emit());

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "Users": [
//     {
//       "Attributes": [
//         {
//           "Name": "sub",
//           "Value": "1874cf28-00d3-4ac1-a24a-68dcb0cecf09"
//         },
//         {
//           "Name": "email_verified",
//           "Value": "true"
//         },
//         {
//           "Name": "phone_number_verified",
//           "Value": "true"
//         },
//         {
//           "Name": "phone_number",
//           "Value": "+16302581871"
//         },
//         {
//           "Name": "email",
//           "Value": "admin@chilkatsoft.com"
//         }
//       ],
//       "Enabled": true,
//       "UserCreateDate": 1.636404386657E9,
//       "UserLastModifiedDate": 1.636404386657E9,
//       "UserStatus": "FORCE_CHANGE_PASSWORD",
//       "Username": "matt"
//     },
//     {
// 	. . .
//     }
//   ]
// }

i := 0;
count_i := jsonResponse.SizeOfArray('Users');
while i < count_i do
  begin
    jsonResponse.I := i;
    Enabled := jsonResponse.BoolOf('Users[i].Enabled');
    UserCreateDate := jsonResponse.StringOf('Users[i].UserCreateDate');
    UserLastModifiedDate := jsonResponse.StringOf('Users[i].UserLastModifiedDate');
    UserStatus := jsonResponse.StringOf('Users[i].UserStatus');
    Username := jsonResponse.StringOf('Users[i].Username');
    j := 0;
    count_j := jsonResponse.SizeOfArray('Users[i].Attributes');
    while j < count_j do
      begin
        jsonResponse.J := j;
        Name := jsonResponse.StringOf('Users[i].Attributes[j].Name');
        Value := jsonResponse.StringOf('Users[i].Attributes[j].Value');
        j := j + 1;
      end;

    i := i + 1;
  end;
end;