usager
/ˈjuːsɪdʒə/ /ˈjuːzɪdʒə/noun
Church History. Usually with capital initial. A member of the section of the Nonjurors who in 1719 accepted the Communion Service drawn up by Jeremy Collier and others.
Origin
Early 17th century (in an earlier sense). In sense 1 probably from Middle French, French usager person who has the right to use something from usage + -er.