bypassing web forms hardcoding login and password

[cgian31]

I need to hide the complexity from users to access an information
webpage, which is normally accessible after filling in a web
form with the correct data.

The address of the information webpage is like
https://external.address.com/info.asp?<numeric code>
where <numeric code> is a number generated by the server.

This number (always different) is generated by the server only when you
open the first web page in your browser, fill in the right values in 2
fields (user, password) and click Login.

Any advices?