Method IsUsernameUsed

internal/database/users.go:791–800

IsUsernameUsed returns true if the given username has been used other than the excluded user (a non-positive ID effectively meaning check against all users).

(ctx context.Context, username string, excludeUserID int64)

// the excluded user (a non-positive ID effectively meaning check against all
// users).
func (s *UsersStore) IsUsernameUsed(ctx context.Context, username string, excludeUserID int64) bool {
	if username == "" {
		return false
	}
	return s.db.WithContext(ctx).
		Select("id").
		Where("lower_name = ? AND id != ?", strings.ToLower(username), excludeUserID).
		First(&User{}).
		Error != gorm.ErrRecordNotFound
}

// List returns a list of users. Results are paginated by given page and page
// size, and sorted by primary key (id) in ascending order.