def allowed(self, **kwargs):
resp, instance = self.request("<STR_LIT:GET>", self.uri, params=kwargs)<EOL>return self.load_instance(instance)<EOL>
Get all available sender settings which could be used in "from" parameter of POST messages method.
Returns :class:`Source` object.

:Example:

allowed = client.sources.allowed()

:param country:  Return sender settings available in specified country only. Optional.