fix(facebookEvents.js): check userGroups is defined before looking at it's properties
fix(facebookEvents.js): check userGroups is defined before looking at it's properties

mbrochh/webuild,webuildorg/webuild-repos,fredericksilva/webuild,mbrochh/webuild,webuildsg/webuild,webuildsg/webuild,fredericksilva/webuild,webuildsg/webuild,webuildorg/webuild-events,fredericksilva/webuild,mbrochh/webuild