Return the users logged in information from the device.

def get_users_text(self):
        """Return the users logged in information from the device."""
        users_text = None
        if self.users_cmd:
            try:
                users_text = self.device.send(self.users_cmd, timeout=60)
            except CommandError:
                self.log('Unable to collect connected users information')
        else:
            self.log('No users command for {}'.format(self.platform))
        return users_text