Forgot my Username-Email and my password, but remember the IP

hello, me and my brother played on a server with the ip of big_spud.aternos.me we had a really nice base built and had a very nice seed, me and my brother want to play on it again though, but i cannot remember the username-Email nor the password, i know that my brothers in game name was SwVisi and mine was probably Dalbajobs, if possible to help me, i would really appreciate it.