Morning folks

My wife and I just purchased a MBP 13 for the both of us for the holidays that I'm setting up for school. I ran Migration Assistant to migrate some files from my iMac to the MBP, and taking a look around, it seems to have gone ok for the most part. But I've also noticed that my Administrative Account on the iMac has also taken primary residency on the MBP, and in fact, it has set up itself as the primary Admin Account. I cant find a way to switch it to the account originally set on the MBP. Any way that I can change this without having to reset the laptop back to it's factory settings?

Thank you in advance ;-)