UserID is not a valid member of Player?

I'm trying to give a badge when the NPC dies but it says that the UserID is not a valid member of the player. How could I fix this? I'd appreciate anyone who can help me.

local Players = game:GetService("Players")
local Bird = script.Parent:WaitForChild("Humanoid")
local BadgeService = game:GetService("BadgeService")

local BadgeID = 0 --I haven't made a badge yet

while wait() do
	if Bird.Died then
		for i, player in pairs(game.Players:GetPlayers()) do
			BadgeService:AwardBadge(player.UserID, BadgeID)
			print("Badge has been given.")
		end
	end
end