def __init__(self, username=None, password=None, account_sid=None, region=None,<EOL>http_client=None, environment=None):
environment = environment or os.environ<EOL>self.username = username or environment.get('<STR_LIT>')<EOL>"""<STR_LIT>"""<EOL>self.password = password or environment.get('<STR_LIT>')<EOL>"""<STR_LIT>"""<EOL>self.account_sid = account_sid or self.username<EOL>"""<STR_LIT>"""<EOL>self.region = region<EOL>"""<STR_LIT>"""<EOL>if not self.username or not self.password:<EOL><INDENT>raise TwilioException("<STR_LIT>")<EOL><DEDENT>self.auth = (self.username, self.password)<EOL>"""<STR_LIT>"""<EOL>self.http_client = http_client or TwilioHttpClient()<EOL>"""<STR_LIT>"""<EOL>self._accounts = None<EOL>self._api = None<EOL>self._authy = None<EOL>self._autopilot = None<EOL>self._chat = None<EOL>self._fax = None<EOL>self._flex_api = None<EOL>self._insights = None<EOL>self._ip_messaging = None<EOL>self._lookups = None<EOL>self._messaging = None<EOL>self._monitor = None<EOL>self._notify = None<EOL>self._preview = None<EOL>self._pricing = None<EOL>self._proxy = None<EOL>self._serverless = None<EOL>self._studio = None<EOL>self._sync = None<EOL>self._taskrouter = None<EOL>self._trunking = None<EOL>self._verify = None<EOL>self._video = None<EOL>self._voice = None<EOL>self._wireless = None<EOL>
Initializes the Twilio Client

:param str username: Username to authenticate with
:param str password: Password to authenticate with
:param str account_sid: Account Sid, defaults to Username
:param str region: Twilio Region to make requests to
:param HttpClient http_client: HttpClient, defaults to TwilioHttpClient
:param dict environment: Environment to look for auth details, defaults to os.environ

:returns: Twilio Client
:rtype: twilio.rest.Client