can I get help with my script I wanna make a team only group rank gui Help would be nice?

local groupId = 7635145

game.Players.PlayerAdded:Connect(function(Player)
	Player.CharacterAdded:Connect(function(Character)
		local GuiClone = script.OverheadGui:Clone()
		GuiClone.Parent = Character.Head
		
		local InformationLabel = GuiClone.InformationLabel
		 
 if plr.TeamColor ==("Really black") then
		local PlayerRank = Player:GetRoleInGroup(groupId)
		InformationLabel.Text = Player.Name .. " - " .. PlayerRank
	end)
end)