private String GETrequest(String nMountpoint, String nUsername, String nPassword){
        String requestmsg = "";
        requestmsg += "GET /" + nMountpoint + " HTTP/1.0rn";
        requestmsg += "Host: " + nServer +"rn";
        requestmsg += "User-Agent: NTRIP Client v1rn";
        requestmsg += "Ntrip-Version: Ntrip/2.0rn";
        requestmsg += "Accept: */* rn";
        requestmsg += "Connection: closern";
        if (nUsername.length() > 0) {
            requestmsg += "Authorization: Basic " + Base64.getEncoder().encodeToString((nUsername + ":" + nPassword).getBytes(StandardCharsets.UTF_8)) + "rnrn";
        }

        return requestmsg;
    }

GET /mP HTTP/1.0
Host: host.address.net
User-Agent: NTRIP Client v1
Ntrip-Version: Ntrip/2.0
Accept: */*
Connection: close
Authorization: Basic dGVzdHVzZXI6dGVzdHBhc3M=


checking credentials
dGVzdHVzZXI6dGVzdHBhc3M=
lavrovson:exotech
User: testuser,    Pass: testpass

private String GETrequest(String nMountpoint, String nUsername, String nPassword){
        String requestmsg = "";
        requestmsg += "GET /" + nMountpoint + " HTTP/1.0rn";
        requestmsg += "Host: " + nServer +"rn";
        requestmsg += "User-Agent: NTRIP Client v1rn";
        requestmsg += "Ntrip-Version: Ntrip/2.0rn";
        requestmsg += "Accept: */* rn";
        requestmsg += "Connection: closern";
        if (nUsername.length() > 0) {
            String usps = nUsername + ":" + nPassword;
            byte[] bt = null;
            try {
                bt = usps.getBytes("UTF-8");
            } catch (UnsupportedEncodingException e) {e.printStackTrace();}
            String base64 = Base64.encodeToString(bt, Base64.DEFAULT);
            requestmsg += "Authorization: Basic " + base64 + "rnrn";
        }

        return requestmsg;
    }

GET /mP HTTP/1.0
Host: host.address.net
User-Agent: NTRIP Client v1
Ntrip-Version: Ntrip/2.0
Accept: */*
Connection: close
Authorization: Basic dGVzdHVzZXI6dGVzdHBhc3M=



checking credentials
dGVzdHVzZXI6dGVzdHBhc3M=

byte[] valueDecoded = Base64.getDecoder().decode(decodedString);
String UserPass = new String(valueDecoded, StandardCharsets.UTF_8);
String[] UP = UserPass.split(":");