private Teacher AddTeacher(AppUserManager manager, int id, string userName, string password, string firstName, string lastName)
{
var user = AddUserAndRole(manager, userName, password, firstName, lastName, "teacher");
var teacher = new Teacher {
Id = id, User_Id = user.Id
};
Teachers.AddOrUpdate(t => t.Id, teacher);
SaveChanges();
return(teacher);
}
