OAuth2 and JWT, native in Delphi

uses
  sgcHTTP_OAuth2_Client;
var
  OAuth2: TsgcHTTP_OAuth2_Client;
begin
  OAuth2 := TsgcHTTP_OAuth2_Client.Create(nil);
  OAuth2.OAuth2Options.GrantType := auth2CodePKCE;
  OAuth2.OAuth2Options.ClientId := 'your-client-id';
  OAuth2.AuthorizationServerOptions.AuthURL := 'https://provider.com/oauth2/authorize';
  OAuth2.AuthorizationServerOptions.TokenURL := 'https://provider.com/oauth2/token';
  OAuth2.AuthorizationServerOptions.Scope.Text := 'openid profile';
  OAuth2.LocalServerOptions.IP := '127.0.0.1';
  OAuth2.LocalServerOptions.Port := 8080;

  OAuth2.OnAfterAccessToken := OAuth2AccessToken;
  OAuth2.Start;   // opens the browser; the redirect lands on the local server
end;

procedure TForm1.OAuth2AccessToken(Sender: TObject);
begin
  Memo1.Lines.Add('Access token received.');
end;

uses
  sgcHTTP_JWT_Client;
var
  JWT: TsgcHTTP_JWT_Client;
begin
  JWT := TsgcHTTP_JWT_Client.Create(nil);
  JWT.JWTOptions.Header.alg := jwtHS256;
  JWT.JWTOptions.Algorithms.HS.Secret := '79F66F1E-E998-436B-8A0A-3E5DEFA4FD9E';
  JWT.JWTOptions.Payload.iss := 'your-service';
  JWT.JWTOptions.Payload.sub := '1234567890';
  JWT.JWTOptions.Payload.iat := DateTimeToUnix(Now);

  ShowMessage(JWT.Sign);

  // or attach it to a WebSocket / HTTP client directly:
  // Client.Authentication.Token.Enabled := True;
  // Client.Authentication.Token.JWT := JWT;
end;