api_auth_update.py

#Now add this to api/settings.py

AUTH_USER_MODEL = 'users.CustomUser'

ACCOUNT_USER_MODEL_USERNAME_FIELD = None
#setting email field as required one
ACCOUNT_EMAIL_REQUIRED = True
ACCOUNT_UNIQUE_EMAIL = True
ACCOUNT_USERNAME_REQUIRED = False
ACCOUNT_AUTHENTICATION_METHOD = 'email'
#change optional to mandatory to mandate email verification.
ACCOUNT_EMAIL_VERIFICATION = 'optional'
ACCOUNT_CONFIRM_EMAIL_ON_GET = True
#Change these to set custom page to redirect user after email verification.
ACCOUNT_EMAIL_CONFIRMATION_ANONYMOUS_REDIRECT_URL = '/'
ACCOUNT_EMAIL_CONFIRMATION_AUTHENTICATED_REDIRECT_URL = '/

SITE_ID = 1

EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'

AUTHENTICATION_BACKENDS = (
    # default
    'django.contrib.auth.backends.ModelBackend',
    # email login
    'allauth.account.auth_backends.AuthenticationBackend',
)