How do I enable intellisense and autocomplete?

[KittyBorgX]

How do i enable intellisense and bring up the autocomplete menu while typing?
I'm referring to something like this:

[the-mikedavis]

Language Server features are enabled out-of-the-box but you will need to install the appropriate Language Server for the language you're working in https://github.com/helix-editor/helix/wiki/How-to-install-the-default-language-servers

[KittyBorgX]

I've installed the rust-analyser binary and hx --health shows it as installed and active.

Although, I haven't added anything in the ~/.config/helix/config.toml apart from a theme choice or in the ~/.config/helix/languages.toml

[KittyBorgX]

Update : It works now! I have no clue why, how or when.
The link given by @the-mikedavis was really helpful! Thanks!

Tl;dr - Install the rust-analyser binary and you should be good to go :^)