   @removeFromGuestsGroup = (account, callback) ->
     JGroup.one { slug: 'guests' }, (err, guestsGroup) ->
       return callback err  if err?
-      return callback message: "Guests group not found!"  unless guestsGroup?
+      return callback errorize "Guests group not found!"  unless guestsGroup?
       guestsGroup.removeMember account, callback
 
   createGroupStack = (account, groupName, callback)->

      JInvitation = require '../invitation'
      JInvitation.byCode invitationToken, (err, invitation_) =>
        return callback err  if err
        return callback { message: "invitation is not valid" }  unless invitation_
        invitation = invitation_
        queue.next()


    , ->
      # fetch account of the user, we will use it later
      JAccount.one { "profile.nickname": username }, (err, account_)->
        return callback errorize "couldn't find account!"  if err
        account = account_
        queue.next()

