How to make a TextButton with certain text kill the player who entered that text?

TextButton.Changed:Connect(function()
	if TextButton.Text == ("I like cheese and milk") then
		TextBox.Text = ("I like yur cut g") 

Within these lines I want to kill the player within the if statement and after the then. I tried this; but it did not work? The player did not die. Any thoughts?

local humanoidcheck = game:FindFirstChild("Humanoid")
if humanoidcheck ~= nil then
humanoidcheck.Health = 0

You need to put the value you want to be changed for .Changed to work, in this case, it would be TextButton.Text.

TextButton.Text.Changed:Connect(function()
    if TextButton.Text == ("I like cheese and milk") then
        TextBox.Text = ("I like yur cut g") 
    end
end)