old_contents: """Basic User Forms"""
  # to implement something like https://github.com/jcugat/django-custom-user/blob/master/custom_user/forms.py
  
new_contents: """Basic User Forms"""
  from django import forms
  from django.contrib.auth import get_user_model
  from django.utils.translation import ugettext_lazy as _
  
  
  class UserCreationForm(forms.ModelForm):
      """
      A form for creating new users.
      Includes all the required fields, plus a repeated password.
      """
  
      error_messages = {
          'duplicate_email': _("A user with that email already exists."),
          'password_mismatch': _("The two password fields didn't match."),
      }
  
      password1 = forms.CharField(
          label=_("Password"),
          widget=forms.PasswordInput)
      password2 = forms.CharField(
          label=_("Password confirmation"),
          widget=forms.PasswordInput,
          help_text=_("Enter the same password as above, for verification."))
  
      class Meta:
          """Meta class properties"""
          model = get_user_model()
          fields = ('email',)
  
      def clean_email(self):
          """ Clean form email.
          :return str email: cleaned email
          :raise forms.ValidationError: Email is duplicated
          """
          # Since User.email is unique, this check is redundant,
          # but it sets a nicer error message than the ORM. See #13147.
          email = self.cleaned_data["email"]
          try:
              get_user_model()._default_manager.get(email=email)
          except get_user_model().DoesNotExist:
              return email
          raise forms.ValidationError(
              self.error_messages['duplicate_email'],
              code='duplicate_email',
          )
  
      def clean_password2(self):
          """ Check that the two password entries match.
          :return str password2: cleaned password2
          :raise forms.ValidationError: password2 != password1
          """
          password1 = self.cleaned_data.get("password1")
          password2 = self.cleaned_data.get("password2")
          if password1 and password2 and password1 != password2:
              raise forms.ValidationError(
                  self.error_messages['password_mismatch'],
                  code='password_mismatch',
              )
          return password2
  
      def save(self, commit=True):
          """ Save user.
          Save the provided password in hashed format.
          :return custom_user.models.EmailUser: user
          """
          user = super(UserCreationForm, self).save(commit=False)
          user.set_password(self.cleaned_data["password1"])
          if commit:
              user.save()
          return user
  
  
  
subject: include users creation form