def start(self, device_uuid):
status_code, _, session = self.http_client.post('<STR_LIT>',<EOL>body=None,<EOL>headers=self.build_headers(device_uuid))<EOL>return None if status_code == <NUM_LIT> else session<EOL>
Start synchronization flow

Starts a new synchronization session.
This is the first endpoint to call, in order to start a new synchronization session.

:calls: ``post /sync/start``
:param string device_uuid: Device's UUID for which to perform synchronization.
:return: Dictionary that support attribute-style access and represents newely created Synchronization Session or None.
:rtype: dict