DelphiXE8 and WSDL, disable authentication via Smart Card Reader

[carmeloconny]

I'm sorry* if I write in translated English.
With Delphi XE8 I imported a SOAP WSDL and use the HTTPRIO component For use authentication:

Delphi-Quellcode:

procedure HTTPRIO1HTTPWebNode1BeforePost(const HTTPReqResp: THTTPReqResp;
  Data: Pointer);
var
 auth: String;
 FUserName, FPassword : string;
begin
 FUserName:=UtenteTS;
 FPassword:=PassTS;
 auth := 'Authorization: Basic ' + TNetEncoding.Base64.Encode(FUserName + ':' + FPassword);
 HttpAddRequestHeaders(Data, PChar(auth), Length(auth), HTTP_ADDREQ_FLAG_ADD);
end;

Works well.

The problem is: when a Smart Card Reader with a digital signature card is inserted in the PC, during authentication it communicates with the smart card, opening a PIN request window.
image:
https://i.stack.imgur.com/puJ7E.jpg

I don't want this, i want to prioritize authentication through HTTPRIO1HTTPWebNode1BeforePost !

Note:

Run debug, HTTPRIO1HTTPWebNode1BeforePost, it is processed and then communication with the smart card is started. How can I disable Smart Card Reader reading?

The card with the digital signature I need connected to the PC because my program has to digitally sign documents.