Clearly indicate when I'm logged in on iOS

I use an iPhone and intend to always be logged in to the app. For the first few weeks, I was taking polls and would check the invisible nav bar on the right to see if I was logged in, then slide it away. Last week, although I was able to answer the poll, I was shocked to see that I was no longer logged in, causing my response to not be recorded in my profile. Had there been some indication on the screen when I was taking the poll that I was not logged in, I would have immediately done so. The request here is to make it visible at all times, even in the smallest way, that I am not logged in. Otherwise, excellent app and experience in class! Keep up the great work!! :)