Accessing an array in template

[Sparticuz]

I'm trying to access a value of an array in a template. Specifically, a URI from Bitwarden's login variable. This is what I have right now

{{ (bitwarden "item" "the_item").login.uris[0].uri }}

However, it seems that [ is an invalid character

chezmoi: template: bin/executable_mountnas.tmpl:20: bad character U+005B '['

[twpayne]

For this you need the index function, for example:

{{ (index (bitwarden "item" "the_item").login.uris 0).uri }}