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