'A init class for TokenlessAuthHelper.
:param env: The HTTP request environment that should contain
client certificate attributes. These attributes should match
with what the mapping defines. Or a user cannot be mapped and
results un-authenticated. The following examples are for the
attributes that reference to the client certificate\'s Subject\'s
Common Name and Organization:
SSL_CLIENT_S_DN_CN, SSL_CLIENT_S_DN_O
:type env: dict'

def __init__(self, env):

    self.env = env
