Request the specified team membership from the OpenID user

        @param team_name: the unqualified team name
        @type team_name: str

def requestTeam(self, team_name):
        """Request the specified team membership from the OpenID user

        @param team_name: the unqualified team name
        @type team_name: str
        """
        if not team_name in self.requested:
            self.requested.append(team_name)