syntax group name for a variable name?

[norogoth]

I apologize for the dumb question but what is the syntax group for a general variable name?
I want something like let myVar = 5; to have coloring on the myVar.

[norogoth]

I couldn't find it looking through https://github.com/jelera/vim-javascript-syntax/blob/master/syntax/javascript.vim