Kessel run and redeem codes question

So firstly is it possible to complete the kessel run rewards in the online store? I have never been able to reach the omicron reward since the event resets before I can get to the halfway point. I check in multiple times a day and do all the requirements but I just can't get to it. Also what is the redeem code thing in the online store? It never showed up before until recently and I'm curious as to what it's intended for.