How can I Auto complete playernames? [Not SOLVED]

Hello. am working on an Gui for the moderators of my game. I want that they can teleport to a player. But because some players have usernames like "jothebreadroflxddddhahahaloldie" it would be nice if they could just enter "jothebread" and the script would autocomplete that to "jothebreadroflxddddhahahaloldie". Is there any way to do that? And if theres a way: How?

I've made a simple script/function for you:

function findName(input)
	local names = {}
	local plrs = game.Players:GetChildren()
	for i = 1,#plrs do
		if string.sub(plrs[i],1,string.len(string.lower(input))) == string.lower(input) then
			table.insert(names,#names,plrs[i])
		end
	end
	return names
end

Here's an example: Players: Vinceberget, Sonnenroboter.

execute function:

  print(table.concat(findName("vince"),", ")

Result:

Vinceberget

local Players = game:GetService("Players")
function autoComplete(toComplete)
	local matches = {}
	for i,plr in pairs(Players:GetPlayers()) do
		if(string.sub(1,tocomplete.length):lower() == toComplete:lower())then
			table.insert(matches, plr.Name)
		end
	end
	if(#matches == 1) then return matches[1] end
end

Here you go! ;)