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django-registration-plus / registration / signals.py

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from django.dispatch import Signal


# A user has been invited
user_invited = Signal(providing_args=["invitation", "request"])

# A new user has registered.
user_registered = Signal(providing_args=["user", "request"])

# A user has activated his or her account.
user_activated = Signal(providing_args=["user", "request"])

# A user has validated his or her email.
email_validated = Signal(providing_args=["user", "request"])