Is there a script that doesnt allow users to join your game if they join like days ago ?

This is a yes or no question (I DO NOT WANT A SCRIPT)

Players have a property accessible using: Player.AccountAge, just use a 'if' statement and kick them out if the 'if' statement returns false.

Local Script Example:

player = game:GetService("Players").LocalPlayer -- not really needed but I just added this for no particular reason unless you want to put a player variable instead from the function without the need of creating a variable like this
minimumage = 10
game:GetService("Players").PlayerAdded:connect(function() -- when a player joins the game
	if player.AccountAge >= minimumage then
		print("Enter!")
	else
		player:Destroy() -- this shuts down the player, thus he is kicked
end)

Regular Script Example:

minimumage = 10
game:GetService("Players").PlayerAdded:connect(function(player) -- when a player joins the game
	if player.AccountAge >= minimumage then
		print("Enter!")
	else
		player:Destroy() -- this shuts down the player, thus he is kicked
end)

>= means greater than or equal to, by the way.