wifi antenna

Hello my question is i used to have a adsl connection and i have a modem to connect internet but due to bad telephone lines i changed to a Wifi internet connection . They put a sattallie dish on the roof and connect the ethernet coming from anntene to router. Back in the days im using adsla and a modem in the setting there is a username and password to connect to the broadbands server due to internet access but with this new antenna setup there no option that i can change. example for a different hotspot or something. My question is how im connecting to internet my broadband provides me without a username or password or if they are where can i change the setting of antenna for another hotspot? (My setup is a antenne output is a ethernet port also connected to a power supply and that ethernet goes into router)