Documentation: 
https://django-registration.readthedocs.io/en/latest/
https://pypi.org/project/django-registration/
https://github.com/ubernostrum/django-registration
 

pip install django-registration==3.3

INSTALLED_APPS = [
    ...

    'django_registration',

    ...
]

Create the required folders and templates

mysite/templates/django_registration
    activation_complete.html
    activation_email_body.txt
    activation_email_subject.txt
    activation_failed.html
    registration_closed.html
    registration_complete.html
    registration_form.html

mysite/templates/registration
    logged_out.html
    login.html
    password_change_done.html
    password_change_form.html
    password_reset_complete.html
    password_reset_confirm.html
    password_reset_done.html
    password_reset_email.html
    password_reset_form.html
    password_reset_subject.txt