How do you spawn on a checkpoint when you rejoin?

I have an obby game that saves data in the datastore, the only problem is when you rejoin the game you spawn not at the level your on but on the original spawn. What is an example script on how to rejoin on the checkpoint you were last on. like i said i got it to save the data, i just need a function so when the player rejoin you teleport to you Stage.Value.