If I didn't buy my computer at best buy, can I still take it to geek squad there?

my macbook charger has randomly stopped working. it worked fine yesterday, but now when it is plugged in to both the outlet and the macbook, the computer like isn't picking it up and isn't showing that anything is plugged in. lve tried 3 different outlets and ive tried restarting the computer. i think it's the charger but the apple store is pretty far from where i am and i can't make it out there. can i just go to best buy to see if the charger is the issue, even if i didnt buy the macbook there?