Improve error when attempting to create a group with the system user.

### Changed

- Size limit for status messages increased from 128 to 2048 characters.

- Improve unfiltered group listings responses.

- Improve error when attempting to create a group with the system user.

## [3.4.0] - 2021-07-08

### Added

	ErrGroupLastSuperadmin    = errors.New("user is last group superadmin")

	ErrGroupUserInvalidCursor = errors.New("group user cursor invalid")

	ErrUserGroupInvalidCursor = errors.New("user group cursor invalid")

	ErrGroupCreatorInvalid    = errors.New("group creator user ID not valid")

)

type groupListCursor struct {

func CreateGroup(ctx context.Context, logger *zap.Logger, db *sql.DB, userID uuid.UUID, creatorID uuid.UUID, name, lang, desc, avatarURL, metadata string, open bool, maxCount int) (*api.Group, error) {

	if userID == uuid.Nil {

		logger.Panic("This function must be used with non-system user ID.")

		return nil, ErrGroupCreatorInvalid

	}

	state := 1