public async Task <dynamic> Add(StudentGroupRequest studentGroupRequest)
{
if (studentGroupRequest == null)
{
AddError("20000");
return(null);
}
var course = await _courseRepository.FindById(studentGroupRequest.CourseId);
var studentGroup = StudentGroup.Create(studentGroupRequest.Name, course);
_studentGroupRepository.Add(studentGroup);
var studentResponse = _mapper.Map <StudentGroup, StudentGroupResponse>(studentGroup);
return(await Task.FromResult(studentResponse));
}