I can't get "delay" to work

[fsgreco]

I'm using Packer instead of Lazyvim, but I saw online some configurations from I get inspiration. The problem I have is that delay is not working.

The behaviour I'm looking for is simple: I want to use leader but also want to delay 1 or 2 seconds before popup appears. (my goal is to see which-key only if I do not remember the shortcut, If I already know the shortcut i can digit it fast and avoid popup to appear). Is that possible?

My configuration so far (inside Packer setup):

	use { 'folke/which-key.nvim', {
		opts = { delay = function()
  			local delay = 1000
			return delay 
		end, }
	}}

and this inside my init lua:

vim.o.timeout = true
vim.o.timeoutlen = 1000

Unfortunately the popup appears right away and do not delay.

[fsgreco]

SOLVED
In case you encounter the same problem, it should be seeted like this:

use { 'folke/which-key.nvim', 
    config = function()
      require('which-key').setup({
        delay = 3000,
      })
    end,
}