Vim (key-bindings) with Visual Studio Code vim extension

Question

This is in my .vimrc file:

:nmap p :pu<CR>

I'm looking for the equivalent in vs-code(vim extension), and I tried the following but it didn't work:

 "vim.normalModeKeyBindings": [
    {
        "before": ["p"],
        "after": ["p","u","<CR>"]
    },
]