title: django.core.exceptions.FieldError: Unknown field(s) (academic_grade) specified for User
body: <p>I am creating a form, inside forms.py I have:</p>
  
  <pre><code>class UserForm(forms.ModelForm):
      password = forms.CharField(widget=forms.PasswordInput)
  
      class Meta:
          model = User
          fields = ['first_name', 'last_name',
                    'username', 'email', 'academic_grade',]
  </code></pre>
  
  <p>But I get the following error:</p>
  
  <pre><code>django.core.exceptions.FieldError: Unknown field(s) (academic_grade) specified for User
  </code></pre>
  
  <p>I check in the database and user table have the 'academic_grade' grade column</p>
  
  <p>models.py</p>
  
  <pre><code>class User(AbstractBaseUser, PermissionsMixin):
      username = models.CharField(max_length=30, blank=True, default='')
      academic_grade = models.CharField(choices=GRADE_CHOICES, default='')
  </code></pre>
  
  <p>please guide me through this</p>