[BUG] open_mapping keybinding only works after `:ToggleTerm` has been called before

[jmpargana]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current Behavior

When I open neovim and use the open_mapping (ex. <c-\>) nothing happens. After I run :ToggleTerm for the first time the mapping becomes available and starts working to open and close the terminal.

I've tried changing the open_mapping option or sticking to the default but nothing changes.

Expected Behavior

Configured mapping should work before running command.

Steps To Reproduce

1. Using the versions listed below, setup a minimal neovim with the following config:

   
   {
   'akinsho/toggleterm.nvim',
   version = '*',
   opts = {
     open_mapping = [[<c-\>]],
   },
   keys = {
     { '<C-t>', '<cmd>ToggleTerm<cr>', desc = '[T]oggle [T]erm' },
   },
   },

2. Launch `nvim` and try to toggle terminal with defined config

### Environment

```Markdown
- OS: MacOS 14.4 (23E214)
- neovim version: NVIM v0.9.5
- Shell: zsh 5.9 (x86_64-apple-darwin23.0)

Anything else?

I'be happy to contribute to this repository by fixing this bug if you giving me some pointers :)

[jmpargana]

After investigating I've noticed that lazy.nvim is not loading the plugin. Running lua require("toggleterm").setup {} or sourcing the toggleterm.lua file loads makes the open_mapping available. I've tried to use the default configuration suggested in the README, but it has the same problem.

Do you have any pointers?

[mixtli]

The open_mapping is not working for me either.

[tkkcc]

you use lazy's key config, this will make it lazy load on key press, https://github.com/folke/lazy.nvim?tab=readme-ov-file#-plugin-spec

you can set lazy to false besides key, or rich the key config for all bindings you need.

[jmpargana]

you use lazy's key config, this will make it lazy load on key press, https://github.com/folke/lazy.nvim?tab=readme-ov-file#-plugin-spec

you can set lazy to false besides key, or rich the key config for all bindings you need.

Thank you that fixed it :)