Whether or not someone has an accent all depends on who is listening to them. Actually, we all probably have an accent since we all sound like where ever we grew up and/or which language we grew up speaking.
People who aren't from MN tell me I have an accent, they even usually say its cute. I don't really think I have one since I sound like most native Minnesotans, at least to my ear. But to someone who isn't from MN, we all have an accent. But I think its really all of them who have one!