def clean_email(self):
        email = self.cleaned_data.get("email")
        if not (User.objects.filter(email=email) or EmailValidation.objects.filter(email=email)):
            return email

        raise forms.ValidationError(_("That e-mail is already used."))
Verify that the email exists
dataset/ETHPy150Open tualatrix/django-profile/userprofile/forms.py/EmailValidationForm.clean_email