We present a structured literature survey of User Experience (UX) dimensions and influencing factors in authentication research. The survey is based on authentication papers presented between 2010 and 2015 on the major human-computer interaction (HCI) and usable privacy and security (UPS) venues. 19% of the found papers include UX topics. Those papers show that there is a variety of ways how authentication research can profit from UX. Nevertheless, UX is often rather a by-product and not recognized as a field of study. We further discuss opportunities and challenges of including UX in authentication research.