fix error on failed registration with already taken email
fix error on failed registration with already taken email

joinrpg/joinrpg-net,leotsarev/joinrpg-net,leotsarev/joinrpg-net,joinrpg/joinrpg-net,leotsarev/joinrpg-net,joinrpg/joinrpg-net,leotsarev/joinrpg-net,joinrpg/joinrpg-net