func (u *Category) GetCategory(id uuid.UUID) (*models.Category, error) {
    var category models.Category
    query := `SELECT * FROM categories WHERE id = $1`
    err := u.DB.QueryRow(query, id).Scan(
       &category.Id,
       &category.Title,
       &category.Description,
    )
    if err != nil {
       if errors.Is(err, sql.ErrNoRows) {
          return nil, appErrors.NewAppError(appErrors.ErrNotFound, err)
       }
       return nil, err
    }
    return &category, nil
}