Remapping crtl+backspace to delete previous word in insert mode!

Problem - Remapping crtl+backspace to delete previous word in insert mode! 

I am finding it really hard to do this, I have tried many combinations but it just doesn't work.

(however, I was able to remap just backspace to delete the previoius word, but that's not practical) Therefore, If anybody has a solution, that would be great! 

Remapping combinations that I tried so far, 

-- vim.keymap.set("i", "<C-BS>", "<C-W>", { desc = "delete whole word" })
-- vim.keymap.set("i", "<C-W>", "<C-\\><C-O>dB", { noremap = true, silent = true })
-- vim.keymap.set("i", "<C-W>", "<C-\\><C-O>db", { noremap = true, silent = true })
-- vim.api.nvim_set_keymap('i', '<BS>', '<C-\\><C-O>db', { noremap = true, silent = true }) (remaps backspace to delete the previoius word)

Thank you, 

Anirudh

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