private static void TryShowWantedData(string input, string[] data)
{
if (data.Length == 2)
{
var courseName = data[1];
StudentsRepository.GetAllStudentsFromCourse(courseName);
}
else if (data.Length == 3)
{
var courseName = data[1];
var userName = data[2];
StudentsRepository.GetStudentsScoresFromCourse(courseName, userName);
}
else
{
DisplayInvalidCommandMessage(input);
}
}