def get_portal_cik(self, portal_name):
portal = self.get_portal_by_name(portal_name)<EOL>cik = portal[<NUM_LIT:2>][<NUM_LIT:1>]['<STR_LIT:info>']['<STR_LIT:key>']<EOL>return cik<EOL>
Retrieves portal object according to 'portal_name' and
        returns its cik.