cant get it to work (newbie)

[Shoxx98]

loaded it with lazy.nvim using this config:

return{
    {
        'VincentBerthier/auto-header.nvim',

        config = function ()
            require("auto-header").setup({
                -- if true, a header will automatically be added when a file is first saved
                create = true,
                -- if true, some fields of the existing header will be updated
                update = true,
                -- languages for which the plugin is enabled. To enable it to all files, add "*"
                languages = { "cpp", "python", "bash", "rust", "lua" },
                -- The keybinding to use (in normal mode only) that will add or refresh the header
                -- Note that it will ignore the create / update parameters specified above, but
                -- will still require a valid template and project information.
                key = nil,
                -- The templates to use to create the headers, one by language ("*" will be used if no specific one was found)
                -- The language is determined by neovim’s buffer filetype.
                templates = {
                    {
                        -- The language for which this template applies
                        language = "*",
                        -- The prefix of each line of the header ("auto" is allowed, the buffer’s commentstring will then be used)
                        prefix = "auto",
                        -- If block and block_length are both set, the header will take the form of a block
                        block = "-",
                        block_length = 0,
                        -- Lines to add before the header
                        before = {},
                        -- Lines to add after the header
                        after = { "4" },
                        -- The comment lines of the buffer
                        -- Some fields preceded by # will be set if known or given
                        template = {
                            "File: #file_relative_path",
                            "Project: #project_name",
                            "Creation date: #date_now",
                            "Author: #author_name <#author_mail>",
                            "-----",
                            "Last modified: #date_now",
                            "Modified By: #author_name <#author_mail>",
                            "-----",
                            -- module.license.MIT
                        },
                        data = {
                            author_name = "",
                            author_mail = "",
                        },
                        -- All the lines beginning with these patterns will be updated
                        track_change = {
                            "File: ",
                            "Last modified: ",
                            "Modified By: ",
                            "Copyright ",
                        },
                    }
                },
            })
        end

    }
}

also tried to use it, just using the first line ('VincentBerthier/auto-header.nvim')

steps to reproduce:

• make file (sdfjk.lua) using % in Netrw
• save it using :w
• optional: run :AutoHeader