def retrieve(self, id) :
_, _, user = self.http_client.get("<STR_LIT>".format(id=id))<EOL>return user<EOL>
Retrieve a single user

Returns a single user according to the unique user ID provided
If the specified user does not exist, this query returns an error

:calls: ``get /users/{id}``
:param int id: Unique identifier of a User.
:return: Dictionary that support attriubte-style access and represent User resource.
:rtype: dict