def create(self, identity, role_sid=values.unset, attributes=values.unset,<EOL>friendly_name=values.unset):
data = values.of({<EOL>'<STR_LIT>': identity,<EOL>'<STR_LIT>': role_sid,<EOL>'<STR_LIT>': attributes,<EOL>'<STR_LIT>': friendly_name,<EOL>})<EOL>payload = self._version.create(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return UserInstance(self._version, payload, service_sid=self._solution['<STR_LIT>'], )<EOL>
Create a new UserInstance

:param unicode identity: A unique string that identifies the user within this service - often a username or email address.
:param unicode role_sid: The unique id of the Role assigned to this user.
:param unicode attributes: An optional string used to contain any metadata or other information for the User.
:param unicode friendly_name: An optional human readable string representing the user.

:returns: Newly created UserInstance
:rtype: twilio.rest.chat.v1.service.user.UserInstance