How to configure fnm

[Irubataru]

Hi! I am still new to zinit, and I am struggling to figure out how to just configure fnm. I saw that there is a setup on the wiki, but that installs fnm, while I would rather have cargo handle that. So, how do I go about loading completions (fnm completions --shell zsh) and loading the environment (fnm env --use-on-cd --shell zsh). All examples I can find reference a file or a github repo, nothing gets its results from running a command.

Usually I'd just add lines with eval to my zshrc, but I would like zinit to handle it if that makes loading faster.