/// <summary>
/// Makes the current session user leave the assignment id group
/// </summary>
public ActionResult LeaveAssignmentGroup(int?assignmentId)
{
if (assignmentId.HasValue)
{
return(Json(_studentService.AssignUserToGroup(_userService.GetUserIdByName(User.Identity.Name), assignmentId.Value)));
}
else
{
return(Json(true));
}
}
