<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_league(self, slug):
 """ Returns a Pokemon League object containing the details about the league. """

        endpoint = '/league/' + slug
        return self.make_request(self.BASE_URL + endpoint)