requireLogin($c) if !$c->user_exists;
    error($c, "Only administrators or authorised users can perform this operation.")

    requireUser($c);
    accessDenied($c, "Only administrators or authorised users can perform this operation.")

    requireLogin($c) if !$c->user_exists;

    requireUser($c);

    requireLogin($c) if !$c->user_exists;

    requireUser($c);

    error($c, "You do not have permission to edit other users.")

    accessDenied($c, "You do not have permission to edit other users.")

    error notFound
    requireLogin requireProjectOwner requireAdmin requirePost isAdmin isProjectOwner

    error notFound accessDenied
    forceLogin requireUser requireProjectOwner requireAdmin requirePost isAdmin isProjectOwner

    error($c, $msg);
}
sub accessDenied {
    my ($c, $msg) = @_;
    $c->response->status(403);

sub requireLogin {

sub forceLogin {

}
sub requireUser {
    my ($c) = @_;
    forceLogin($c) if !$c->user_exists;

    return $c->user_exists && ($c->check_user_roles('admin') || $c->user->username eq $project->owner->username || defined $c->model('DB::ProjectMembers')->find({ project => $project, userName => $c->user->username }));

    return
        $c->user_exists &&
        (isAdmin($c) ||
         $c->user->username eq $project->owner->username ||
         defined $c->model('DB::ProjectMembers')->find({ project => $project, userName => $c->user->username }));

    requireLogin($c) if !$c->user_exists;
    error($c, "Only the project members or administrators can perform this operation.")

    requireUser($c);
    accessDenied($c, "Only the project members or administrators can perform this operation.")

    requireLogin($c) if !$c->user_exists;
    error($c, "Only administrators can perform this operation.")

    requireUser($c);
    accessDenied($c, "Only administrators can perform this operation.")