private void RefreshConnectedUsers()
{
List <string> connectedStudents = LoggedUsers.GetUsers("student").ToList();
StudentCount.Text = connectedStudents.Count.ToString();
StudentList.DataSource = connectedStudents;
List <string> connectedTeachers = LoggedUsers.GetUsers("teacher", "teacher_admin").ToList();
TeacherCount.Text = connectedTeachers.Count.ToString();
TeacherList.DataSource = connectedTeachers;
}
