public async Task AddAssignment(AssignmentCreateModel assignmentCreateModel)
{
var assignment = new Assignment
{
CourseId = assignmentCreateModel.CourseId,
InstructorId = assignmentCreateModel.InstructorId,
StartDate = assignmentCreateModel.StartDate,
EndDate = assignmentCreateModel.EndDate,
Description = assignmentCreateModel.Description,
CreationDate = DateTime.Now
};
await _assignmentRepository.CreateAssignment(assignment);
}
