old_contents: 
  from django import forms
  from django.contrib.auth.password_validation import validate_password
  from . import models
  
  
  class UserCreationForm(forms.ModelForm):
      class Meta:
          model = models.User
          fields = ['email']
  
      password1 = forms.CharField(
          label="Password",
          strip=False,
          widget=forms.PasswordInput,
      )
      password2 = forms.CharField(
          label="Password confirmation",
          widget=forms.PasswordInput,
          strip=False,
          help_text="Enter the same password as before, for verification.",
      )
  
      def clean_password1(self):
          password1 = self.cleaned_data['password1']
          validate_password(password1)
          return password1
  
      def clean_password2(self):
          password1 = self.cleaned_data['password1']
          password2 = self.cleaned_data['password2']
          if password1 != password2:
              raise forms.ValidationError("The two password fields didn't match.")
          return password2
  
      def save(self, commit=True):
          user = super(UserCreationForm, self).save(commit=False)
          user.set_password(self.cleaned_data["password1"])
          if commit:
              user.save()
          return user
  
new_contents: 
  from django import forms
  from django.contrib.auth.password_validation import validate_password
  from . import models
  
  
  class UserCreationForm(forms.ModelForm):
      class Meta:
          model = models.User
          fields = ['email']
  
      password1 = forms.CharField(
          label="Password",
          strip=False,
          widget=forms.PasswordInput,
      )
      password2 = forms.CharField(
          label="Password confirmation",
          widget=forms.PasswordInput,
          strip=False,
          help_text="Enter the same password as before, for verification.",
      )
  
      def clean_password1(self):
          password1 = self.cleaned_data.get('password1')
          validate_password(password1)
          return password1
  
      def clean_password2(self):
          password1 = self.cleaned_data.get('password1')
          password2 = self.cleaned_data.get('password2')
          if password1 and password2 and password1 != password2:
              raise forms.ValidationError("The two password fields didn't match.")
          return password2
  
      def save(self, commit=True):
          user = super(UserCreationForm, self).save(commit=False)
          user.set_password(self.cleaned_data["password1"])
          if commit:
              user.save()
          return user
  
subject: fix keyerror