Add isManaged to user serializer
Add isManaged to user serializer

fotinakis/sentry,beeftornado/sentry,ifduyue/sentry,gencer/sentry,mvaled/sentry,fotinakis/sentry,gencer/sentry,JamesMura/sentry,alexm92/sentry,JamesMura/sentry,mvaled/sentry,alexm92/sentry,JackDanger/sentry,zenefits/sentry,looker/sentry,ifduyue/sentry,gencer/sentry,jean/sentry,beeftornado/sentry,looker/sentry,beeftornado/sentry,mvaled/sentry,BuildingLink/sentry,jean/sentry,fotinakis/sentry,looker/sentry,mvaled/sentry,jean/sentry,ifduyue/sentry,jean/sentry,fotinakis/sentry,looker/sentry,BuildingLink/sentry,JamesMura/sentry,ifduyue/sentry,JamesMura/sentry,mvaled/sentry,ifduyue/sentry,mitsuhiko/sentry,zenefits/sentry,JackDanger/sentry,jean/sentry,BuildingLink/sentry,alexm92/sentry,JackDanger/sentry,zenefits/sentry,JamesMura/sentry,BuildingLink/sentry,gencer/sentry,mvaled/sentry,BuildingLink/sentry,gencer/sentry,looker/sentry,zenefits/sentry,mitsuhiko/sentry,zenefits/sentry