text: class AppSettings(object):
  
      class AuthenticationMethod:
          USERNAME = 'username'
          EMAIL = 'email'
          USERNAME_EMAIL = 'username_email'
  
      class EmailVerificationMethod:
          # After signing up, keep the user account inactive until the email
          # address is verified
          MANDATORY = 'mandatory'
          # Allow login with unverified e-mail (e-mail verification is
          # still sent)
          OPTIONAL = 'optional'
          # Don't send e-mail verification mails during signup
          NONE = 'none'
  
      def __init__(self, prefix):
          self.prefix = prefix
          # If login is by email, email must be required
          assert (not self.AUTHENTICATION_METHOD
                  == self.AuthenticationMethod.EMAIL) or self.EMAIL_REQUIRED
          # If login includes email, login must be unique
          assert (self.AUTHENTICATION_METHOD
                  == self.AuthenticationMethod.USERNAME) or self.UNIQUE_EMAIL
          assert (self.EMAIL_VERIFICATION
                  != self.EmailVerificationMethod.MANDATORY) \
              or self.EMAIL_REQUIRED
          if not self.USER_MODEL_USERNAME_FIELD:
              assert not self.USERNAME_REQUIRED
              assert self.AUTHENTICATION_METHOD \
                  not in (self.AuthenticationMethod.USERNAME,
                          self.AuthenticationMethod.USERNAME_EMAIL)
  
      def _setting(self, name, dflt):
          from django.conf import settings
          getter = getattr(settings,
                           'ALLAUTH_SETTING_GETTER',
                           lambda name, dflt: getattr(settings, name, dflt))
          return getter(self.prefix + name, dflt)
  
      @property
      def DEFAULT_HTTP_PROTOCOL(self):
          return self._setting("DEFAULT_HTTP_PROTOCOL", "http")
  
      @property
      def EMAIL_CONFIRMATION_EXPIRE_DAYS(self):
          """
          Determines the expiration date of e-mail confirmation mails (#
          of days)
          """
          from django.conf import settings
          return self._setting("EMAIL_CONFIRMATION_EXPIRE_DAYS",
                               getattr(settings, "EMAIL_CONFIRMATION_DAYS", 3))
  
      @property
      def EMAIL_CONFIRMATION_AUTHENTICATED_REDIRECT_URL(self):
          """
          The URL to redirect to after a successful e-mail confirmation, in
          case of an authenticated user
          """
          return self._setting("EMAIL_CONFIRMATION_AUTHENTICATED_REDIRECT_URL",
                               None)
  
      @property
      def EMAIL_CONFIRMATION_ANONYMOUS_REDIRECT_URL(self):
          """
          The URL to redirect to after a successful e-mail confirmation, in
          case no user is logged in
          """
          from django.conf import settings
          return self._setting("EMAIL_CONFIRMATION_ANONYMOUS_REDIRECT_URL",
                               settings.LOGIN_URL)
  
      @property
      def EMAIL_REQUIRED(self):
          """
          The user is required to hand over an e-mail address when signing up
          """
          return self._setting("EMAIL_REQUIRED", False)
  
      @property
      def EMAIL_VERIFICATION(self):
          """
          See e-mail verification method
          """
          ret = self._setting("EMAIL_VERIFICATION",
                              self.EmailVerificationMethod.OPTIONAL)
          # Deal with legacy (boolean based) setting
          if ret is True:
              ret = self.EmailVerificationMethod.MANDATORY
          elif ret is False:
              ret = self.EmailVerificationMethod.OPTIONAL
          return ret
  
      @property
      def AUTHENTICATION_METHOD(self):
          from django.conf import settings
          if hasattr(settings, "ACCOUNT_EMAIL_AUTHENTICATION"):
              import warnings
              warnings.warn("ACCOUNT_EMAIL_AUTHENTICATION is deprecated,"
                            " use ACCOUNT_AUTHENTICATION_METHOD",
                            DeprecationWarning)
              if getattr(settings, "ACCOUNT_EMAIL_AUTHENTICATION"):
                  ret = self.AuthenticationMethod.EMAIL
              else:
                  ret = self.AuthenticationMethod.USERNAME
          else:
              ret = self._setting("AUTHENTICATION_METHOD",
                                  self.AuthenticationMethod.USERNAME)
          return ret
  
      @property
      def UNIQUE_EMAIL(self):
          """
          Enforce uniqueness of e-mail addresses
          """
          return self._setting("UNIQUE_EMAIL", True)
  
      @property
      def SIGNUP_PASSWORD_VERIFICATION(self):
          """
          Signup password verification
          """
          return self._setting("SIGNUP_PASSWORD_VERIFICATION", True)
  
      @property
      def PASSWORD_MIN_LENGTH(self):
          """
          Minimum password Length
          """
          return self._setting("PASSWORD_MIN_LENGTH", 6)
  
      @property
      def EMAIL_SUBJECT_PREFIX(self):
          """
          Subject-line prefix to use for email messages sent
          """
          return self._setting("EMAIL_SUBJECT_PREFIX", None)
  
      @property
      def SIGNUP_FORM_CLASS(self):
          """
          Signup form
          """
          return self._setting("SIGNUP_FORM_CLASS", None)
  
      @property
      def RESET_PASSWORD_FORM_CLASS(self):
          """
          Reset password form
          """
          return self._setting("RESET_PASSWORD_FORM_CLASS", None)
  
      @property
      def USERNAME_REQUIRED(self):
          """
          The user is required to enter a username when signing up
          """
          return self._setting("USERNAME_REQUIRED", True)
  
      @property
      def USERNAME_MIN_LENGTH(self):
          """
          Minimum username Length
          """
          return self._setting("USERNAME_MIN_LENGTH", 1)
  
      @property
      def USERNAME_BLACKLIST(self):
          """
          List of usernames that are not allowed
          """
          return self._setting("USERNAME_BLACKLIST", [])
  
      @property
      def PASSWORD_INPUT_RENDER_VALUE(self):
          """
          render_value parameter as passed to PasswordInput fields
          """
          return self._setting("PASSWORD_INPUT_RENDER_VALUE", False)
  
      @property
      def ADAPTER(self):
          return self._setting('ADAPTER',
                               'allauth.account.adapter.DefaultAccountAdapter')
  
      @property
      def CONFIRM_EMAIL_ON_GET(self):
          return self._setting('CONFIRM_EMAIL_ON_GET', False)
  
      @property
      def LOGIN_ON_EMAIL_CONFIRMATION(self):
          """
          Autmatically log the user in once they confirmed their email address
          """
          return self._setting('LOGIN_ON_EMAIL_CONFIRMATION', True)
  
      @property
      def LOGOUT_REDIRECT_URL(self):
          return self._setting('LOGOUT_REDIRECT_URL', '/')
  
      @property
      def LOGOUT_ON_GET(self):
          return self._setting('LOGOUT_ON_GET', False)
  
      @property
      def USER_MODEL_USERNAME_FIELD(self):
          return self._setting('USER_MODEL_USERNAME_FIELD', 'username')
  
      @property
      def USER_MODEL_EMAIL_FIELD(self):
          return self._setting('USER_MODEL_EMAIL_FIELD', 'email')
  
      @property
      def SESSION_COOKIE_AGE(self):
          """
          Remembered sessions expire after this many seconds.
          Defaults to 1814400 seconds which is 3 weeks.
          """
          return self._setting('SESSION_COOKIE_AGE', 60 * 60 * 24 * 7 * 3)
  
      @property
      def SESSION_REMEMBER(self):
          """
          Controls the life time of the session. Set to `None` to ask the user
          ("Remember me?"), `False` to not remember, and `True` to always
          remember.
          """
          return self._setting('SESSION_REMEMBER', None)
  
      @property
      def FORMS(self):
          return self._setting('FORMS', {})
  
  
  # Ugly? Guido recommends this himself ...
  # http://mail.python.org/pipermail/python-ideas/2012-May/014969.html
  import sys
  app_settings = AppSettings('ACCOUNT_')
  app_settings.__name__ = __name__
  sys.modules[__name__] = app_settings
  