from django import forms
from django.utils.translation import gettext as _

from django.contrib.auth.models import User

class UserForm(forms.Form):
    """
    Default user creation form. Can be altered with the 
    `SOCIALREGISTRATION_SETUP_FORM` setting.
    """
    username = forms.RegexField(r'^\w+$', max_length=32)
    email = forms.EmailField(required=False)

    def clean_username(self):
        username = self.cleaned_data.get('username')
        try:
            user = User.objects.get(username=username)
        except User.DoesNotExist:
            return username
        else:
            raise forms.ValidationError(_('This username is already in use.'))

    def save(self, request, user, profile, client):
        user.username = self.cleaned_data.get('username')
        user.email = self.cleaned_data.get('email')
        user.save()
        profile.user = user
        profile.save()
        return user, profile

from django import forms
from django.utils.translation import gettext as _

from django.contrib.auth.models import User

class UserForm(forms.Form):
    """
    Default user creation form. Can be altered with the 
    `SOCIALREGISTRATION_SETUP_FORM` setting.
    """
    username = forms.RegexField(r'^\w+$', max_length=32)
    email = forms.EmailField(required=False)

    def clean_username(self):
        username = self.cleaned_data.get('username')
        try:
            user = User.objects.get(username=username)
        except User.DoesNotExist:
            return username
        else:
            raise forms.ValidationError(_('This username is already in use.'))

    def save(self, request, user, profile, client):
        user.username = self.cleaned_data.get('username')
        user.email = self.cleaned_data.get('email')
        user.set_unusable_password()
        user.save()
        profile.user = user
        profile.save()
        return user, profile

Update socialregistration/forms.py