[1.20.1] Custom Statistics

[LittleEzra]

I'm trying to add a custom statistic for how many Easter eggs the player has found to my mod but haven't found any information on how to do this properly. I tried copying the makeCustomStat() method from the Stats class but that gives me the error "Registry is already frozen (trying to add key ResourceKey[minecraft:custom_stat / minecraft:easter_eggs_found])" when I try to use the stat. Does anyone know how to properly add a custom stat?

Edited March 29 by LittleEzra
Added More Information

[dee12452]

A custom Capability is probably the way to go.