[SOLVED] How can i make this script affect only the Player's Humanoid instead of all humanoids?

So the script below hides the player's name.. However i have some NPC/Parts with Humanoids that get their name hidden aswell....I only want to hide it for the players, what should i do?

local billboardgui = game:GetService("ServerStorage"):WaitForChild("GUIs"):WaitForChild("PlayerNameGui")


game.Players.PlayerAdded:connect(function(plr)
    plr.CharacterAdded:connect(function(char)

        char.Humanoid.NameDisplayDistance = 0

        local clonedgui = billboardgui:Clone()
        clonedgui.Parent = game.Workspace:WaitForChild(plr.Name).Head
        clonedgui.TextLabel.Text = plr.Name
    end)
end)