if seenClientIDs.Contains(p.ClientID) {
			return c, config.Errorf("Client ID %s is present with multiple OpenID configurations", p.ClientID)
		}
		seenClientIDs.Add(p.ClientID)

		p.URL, err = xnet.ParseHTTPURL(configURL)
		if err != nil {
			return c, err
		}
		configURLDomain := p.URL.Hostname()
		p.DiscoveryDoc, err = parseDiscoveryDoc(p.URL, transport, closeRespFn)
		if err != nil {
			return c, err
		}