How to use PersistenceSavePre to run commands before saving sessions?

[MoltenMonster]

The readme just lists the events to be called, but I just spent a bunch of time trying to figure out and couldn't. I looked at this issue showing this snippet, which the user reports doesn't work.

		vim.api.nvim_create_autocmd("PersistenceSavePre", {
			desc = "Fix neo-tree before saving",
			-- group = "persistence",
			callback = function()
				print("savePre")
			end,
		})

Folke replied with :h 'User' (the single quotes did confuse me a bit), this is what :h User (capital U) outputs but I tried and don't know how to put so and so together. OP didn't respond with a solution either and closed it.

User				Not executed automatically.  Use |:doautocmd|
				to trigger this, typically for "custom events"
				in a plugin.  Example: >
				    :autocmd User MyPlugin echom 'got MyPlugin event'
				    :doautocmd User MyPlugin

[folke]

The event is User and the pattern is the persistentcepre thing

[MoltenMonster]

Thanks! I got it working now

        vim.api.nvim_create_autocmd("User", {
          pattern = "PersistenceSavePre",
          callback = function()
            vim.cmd(":Neotree close")
          end,
        })

[OliverGuy]

Here's an example:

local group = vim.api.nvim_create_augroup('user-persistence', { clear = true })
vim.api.nvim_create_autocmd('User', {
  group = group,
  pattern = 'PersistenceSavePre',
  callback = function()
    print("savePre")
  end,
})

[rafaeloledo]

persistence.lua

local group = vim.api.nvim_create_augroup("user-persistence", { clear = true })
vim.api.nvim_create_autocmd("User", {
  group = group,
  pattern = "PersistenceSavePre",
  callback = function()
    vim.cmd(":Neotree close")
  end,
})
...

neo-tree.lua

return {
  "nvim-neo-tree/neo-tree.nvim",
  opts = {
    hijack_netrw_behavior = "open_default",
  },
}

don't forget to disable netrw !!!