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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _site_login(self, repo):
 """Logs the user specified in the repo into the wiki. :arg repo: an instance of config.RepositorySettings with wiki credentials. """

        try:
            if not self.testmode:
                self.site.login(repo.wiki["user"], repo.wiki["password"])
        except LoginError as e:
            print(e[1]['result'])
        self.basepage = repo.wiki["basepage"]