per player teleporter

so im trying to make a tool for players to save their position and then teleport to that position later on but i don't know how to make the teleports tie to the player that spawned them?
sorry if this is a silly question and it probably has a super easy solution but im genuinely stuck
it just spawns an invisible armor stand with the tag "position" in the place the player clicked in and teleports the player to any entity with the tag "position", in a limit of only 1 and to the nearest
the problem with this is that i ASSUME if 2 or more players use it in the same server, they might accidentally mix up in the armor stands and end up teleporting to the wrong one
btw the scoreboard in the side is my pitiful attempt at making sort of a identifier but i really didnt know what i was doing lol
(not a datapack yet atleast, its a command block string mostly because i have no idea how to make a dp yet)