Team Property of Player Objects

In Roblox, player objects have a Team property that is whatever team they are on. So, to see whether if a player is on a certain team, you would simply check if the Team property of a given player is the team you desire.

local teamname = "SomeThing"
local plr = ...
if plr.Team == game.Teams[teamname] then
	print("player on the team")
end

Hopefully this helped! Be sure to accept if it did!