What’s the mistake?
in the Username field (introduced the name you need to authorize) in the Password field (introduced the password for authorization) in the variable (URL 2) entered the address to the site (server)
This is server/endpoint specific and no one will answer you this way.
You are not providing server address. If it is one of the common servers you might get an answer from another member who already tried working with this server.
You want to log in to the site based on the data (login and password) when you click on the site.
so do I look through the server that there were no requests like attempts to log in
web API will not fill in fields in the page. You need a service in the server to receive the data of the API and execute some server side actions.