title: Allauth will not save additional fields
body: <p>I have been trying to extend my allauth signup form but cannot seem to get it working, I receive no error messages and everything appears to work fine except all my additional fields do not get saved. Please tell me if you can see what I am doing wrong, thanks!</p>
  
  <p>Models -</p>
  
  <pre><code>from django.db import models
  from django.contrib.auth.models import User
  
  class EmployerProfile(models.Model):
  
      region_choice = (
          ('1', 'Auckland'),
          ('2', 'Wellington'),
          ('3', 'Christchurch')
      )
      suburb_choice = (
          ('1', 'Glendowie'),
          ('2', 'Kohimarama'),
          ('3', 'Mission Bay')
      )
      industry_choice = (
          ('1', 'Restaurant'),
          ('2', 'IT'),
          ('3', 'Construction')
      )
  
      user = models.OneToOneField(User, unique=True)
      home_number = models.IntegerField(max_length=12)
      mobile_number = models.IntegerField(max_length=12)
      business_name = models.CharField(max_length=50)
      business_address_number = models.IntegerField()
      business_address_street = models.CharField(max_length=50)
      business_address_region = models.CharField(max_length=50, choices=region_choice)
      business_address_suburb = models.CharField(max_length=50, choices=suburb_choice)
      business_address_postcode = models.IntegerField(max_length=4)
      business_industry = models.CharField(max_length=50, choices=industry_choice)
  
      class Meta:
          verbose_name = 'Employer Profile'
  </code></pre>
  
  <p>Forms -</p>
  
  <pre><code>from django import forms
  from models import EmployerProfile
  
  class SignupForm(forms.Form):
  
      first_name = forms.CharField(max_length=30, label='First Name')
      last_name = forms.CharField(max_length=30, label='Last Name')
      home_number = forms.IntegerField(label='Home Number')
      mobile_number = forms.IntegerField(label='Mobile Number')
      business_name = forms.CharField(label='Business Name')
      business_address_number = forms.IntegerField(label='Street Number')
      business_address_street = forms.CharField(label='Street Name')
      business_address_region = forms.ChoiceField(choices=EmployerProfile.region_choice, label='Region')
      business_address_suburb = forms.ChoiceField(choices=EmployerProfile.suburb_choice, label='Suburb')
      business_address_postcode = forms.IntegerField(label='Postcode')
      business_industry = forms.ChoiceField(choices=EmployerProfile.industry_choice, label='Industry')
  
      def signup(self, request, user):
          user.first_name = self.cleaned_data['first_name']
          user.last_name = self.cleaned_data['last_name']
          user.home_number = self.cleaned_data['home_number']
          user.mobile_number = self.cleaned_data['mobile_number']
          user.business_name = self.cleaned_data['business_name']
          user.business_address_number = self.cleaned_data['business_address_number']
          user.business_address_street = self.cleaned_data['business_address_street']
          user.business_address_region = self.cleaned_data['business_address_region']
          user.business_address_suburb = self.cleaned_data['business_address_suburb']
          user.business_address_postcode = self.cleaned_data['business_address_postcode']
          user.business_industry = self.cleaned_data['business_industry']
  
          user.save()
  
      class Meta:
          model = EmployerProfile
  </code></pre>
  
  <p>Settings -</p>
  
  <pre><code>SITE_ID = 1
  ACCOUNT_SIGNUP_FORM_CLASS = 'profiles.forms.SignupForm'
  ACCOUNT_EMAIL_REQUIRED = True
  ACCOUNT_EMAIL_VERIFICATION = None
  LOGIN_REDIRECT_URL = '/'
  </code></pre>