Hiding lualine in zen-mode

[plum]

Please do tell me what I'm doing wrong here!

When I invoke zen-mode, lualine fails to disappear.
In plugins/zenmode.lua , I have written the following code:

`return {
  on_open = function()
    require("lualine").hide({
      place = { "statusline", "tabline", "winbar" }, 
      unhide = false, -- whether to re-enable lualine again/
    })
  end,

  on_close = function()
    require("lualine").hide({ unhide = true })
  end,
}
`

I am fresh to lua code, and am struggling with this after may attempts. Meanwhile I am studying the examples presented here, and the vim-lua guide making my way through the lua wiki tutorials.
i did manage to get lualine hiding with goyo , which appears to be a little more complicated. However, I apprecoiate zen-mode because is written in lua.

Here below, I have modelled a zenmode.lua plugin based on my successful goyo effort, but it too fails to hide the lualine:

`On_open = function()
  require("lualine").hide({
    place = { "statusline", "tabline", "winbar" }, -- the segment this change applies to.
    unhide = false, -- whether to re-enable lualine again/
  })
end


On_close = function()
  require("lualine").hide({ unhide = true })
end

ZenModeGroup = vim.api.nvim_create_augroup("Zen-modeGroup", { clear = true })

vim.api.nvim_create_autocmd("User", {
  pattern = "ZenMode",
  callback = On_open,
  group = ZenModeGroup,
})

vim.api.nvim_create_autocmd("User", {
  pattern = "ZenMode",
  callback = On_close,
  group = ZenModeGroup,
})

Help will spur me on!
John