protected async Task CreateGroupAsync(CreateOrUpdatePictureGroupInput input)
{
var existedGroup = await _pictureManager.GetGroupByNameAsync(input.Name);
if (existedGroup != null)
{
throw new UserFriendlyException(string.Format(L("PictureGallery.Group.Existed"), input.Name));
}
var pictureGroup = new PictureGroup()
{
Name = input.Name,
};
await _pictureManager.CreateGroupAsync(pictureGroup);
}