Detect if a user is on the Roblox devforum or not.

is-devforum.lua

function getDevForumTrustLevel(username) 
	local succ,retval = pcall(function()
		local apiResponse = game.HttpService:GetAsync("https://cors-anywhere.herokuapp.com/https://devforum.roblox.com/users/"..username..".json",false, {
			["x-requested-with"] = "Roblox"
		})
		local j = game.HttpService:JSONDecode(apiResponse)
		if (j["user"]) then
			return j["user"]["trust_level"]
		else
			return -1
		end
	end)
	if succ then
		return retval
	else
		return -2
	end
end

function printTrustLevel(username)
	local trustLevel = getDevForumTrustLevel(username)
	if trustLevel < 0 then
		print(username.." is not registered on the devforum, or there was an error.")
	elseif trustLevel == 0 then
		print(username.." is registered on the devforum, but they do not have a trust level.")
	elseif trustLevel == 1 then
		print(username.." is a new member.")
	elseif trustLevel > 1 then
		print(username.." is a full member or higher.")
	end
end

printTrustLevel("ngmleht")
printTrustLevel("leolwo1")
printTrustLevel("theLMGN")
printTrustLevel("bAdCc")
--[[
  ngmleht is not registered on the devforum, or there was an error.
  leolwo1 is registered on the devforum, but they do not have a trust level.
  theLMGN is a new member.
  bAdCc is a full member or higher.
--]]