docs: @Deprecated
      public Membership createMembershipForUser(int projectId, int itemId, Collection<Role> roles) throws RedmineException {
          // according to the documentation, this the way it is supposed to work : user Id is same as group ID
          // in this context. see:
          // http://www.redmine.org/projects/redmine/wiki/Rest_Memberships#POST
          // http://www.redmine.org/issues/17904
          return createMembershipForGroup(projectId, itemId, roles);
      }