getClassroomRosters.gs

function getClassroomRosters() {  
  var courses = Classroom.Courses.list().courses;
  var email = Session.getActiveUser().getEmail();
  
  for(var i = 0; i < courses.length; i++) {
    var courseState = courses[i].courseState;
    var teacher = Classroom.Courses.Teachers.get(courses[i].id, email);
    var isTeacher = teacher.userId === courses[i].ownerId;
    
    if (courseState == "ACTIVE" && isTeacher) {
    
      var courseName = courses[i].name;
      var students = Classroom.Courses.Students.list(courses[i].id).students || [];
      var course = new Course(courseName, students);
      course.createRoster();

      var tabNames = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("class view").getRange(1+i, 2).setValue(courseName);
    }
  }
}