The Confetti Chariots qualified with a 7 win & 2 Loss record. They notably lost to QMSamurai Mu in matchday 1 & TheFerrersEsports1 in matchday 9.
Two of their listed players are easy to find,
OrBiZDeathStrike appear to be Champion 3 on rocket league tracker.
FinerNebula3960 doesn't appear on rocket league tracker but is in a couple of replays on ballchasing.com playing with and against Champion1-3 players. The remaining 2 players are harder to find
Jango is an epic account & a steam account but both clearly different people. However in one of the matches above
Jang0_. joined the game and that account is Champion 2. The final player is
Aqua.cc this account doesn't appear anywhere.