// UploadPicture <albumName> <pictureTitle> <pictureFilePath>
public string Execute(string command, string[] data)
{
if (data.Length != 3)
{
throw new InvalidOperationException($"Command {command} not valid!");
}
if (!userSessionService.IsLoggedIn())
{
throw new InvalidOperationException("Invalid credentials!");
}
string albumName = data[0];
string pictureTitle = data[1];
string picturePath = data[2];
albumService.AddPicture(albumName, pictureTitle, picturePath);
return($"Picture {pictureTitle} added to {albumName}!");
}