I've got three Nintendo accounts logged in to my Nintendo Switch due to a 7-day trial of Nintendo Switch Online, so there they are:
GCBlox 4834-1504-3705
GCBlox2 5030-1272-6551
GCBlox3 2602-6097-8224
GCBlox4 Coming Soon
GCBlox5 Coming Soon
GCBlox6 Coming Soon
Proof I'm not a YTBA btw
This post will be changed and updated sometime later after when I log these other three accounts that say "Coming Soon"