Check for friends list?

Whats the thing that you can check if there on your friends list? As you can see in this block of code I made omey a acceptable answer but can I just make anyone on my friends list acceptable. I know theres a way I just can't find it. Thanks

if script.Parent.Parent.TextBox.Text:lower()=="omeybabyface" then
		Par.Level.Value=Par.Level.Value+1

player:IsFriendsWith(youruserId)

Also, instead of putting your raw userid, if you are the owner of the place, you can do game.CreatorId.