Force the email to be unique in Mongo (#605)
Force the email to be unique in Mongo (#605)


opendatateam/udata,davidbgk/udata,etalab/udata,opendatateam/udata,jphnoel/udata,davidbgk/udata,etalab/udata,jphnoel/udata,davidbgk/udata,jphnoel/udata,opendatateam/udata,etalab/udata