def set_credentials(self, app_name, cred):
     """Set the credentials of the Ubuntu SSO item."""
     # the windows keyring can only store a pair username-password
     # so we store the data using ubuntu_sso as the user name. Then
     # the cred will be stored as the string representation of the dict.
     return deferToThread(self.keyring.set_password, app_name, USERNAME,
 def delete_credentials(self, app_name):
     """Delete a set of credentials from the keyring."""
     # this call depends on a patch I sent to pykeyring. The patch has
     # not landed as of version 0.5.1. If you have that version you can
     # clone my patch in the following way:
     # hg clone
     # pylint: disable=E1103
     return deferToThread(self.keyring.delete_password, app_name, USERNAME)
 def get_credentials(self, app_name):
     """A deferred with the secret of the SSO item in a dictionary."""
     return deferToThread(self._get_credentials_obj, app_name)