def destroy
      membership = current_user.memberships.find_by(id: params[:id])
      group = membership.group

      Group::Services::Leave.new(group: group, person: current_user).call

      redirect_to group
    end
def destroy
      membership = current_user.memberships.find_by(id: params[:id])
      group = membership.group

      Group::Services::Leave.new(group: group, person: current_user).call

      redirect_to group
    end
DELETE /memberships/1