I’ve started gathering a list of passwords. You can try these:

THANK YOU VERY MUCH
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immortal
imm0rtal
immortal_chess
rebirth
deep4immortalchess
imm0rtal99
Immortal
Imm0rtal
dawgeatdawg
try-to-love-the-game-and-take-them-by-storm
DontFeedLeechers!GetDirectLinksFromImmortalChessForum!
TheBerlinGuyTeaching1.e4
gerdavoss