backends.py 文件源码

def default_username_algo(email):
    # store the username as a base64 encoded sha1 of the email address
    # this protects against data leakage because usernames are often
    # treated as public identifiers (so we can't use the email address).
    return base64.urlsafe_b64encode(
        hashlib.sha1(smart_bytes(email)).digest()
    ).rstrip(b'=')