feat: add possibility to add verifier opts to default RP

pkg/rp/default_rp.go

@@ -41,6 +41,7 @@ type DefaultRP struct {
 	errorHandler func(http.ResponseWriter, *http.Request, string, string, string)
 
 	verifier     Verifier
+	verifierOpts []ConfFunc
 	onlyOAuth2   bool
 }
 
@@ -79,7 +80,7 @@ func NewDefaultRP(rpConfig *Config, rpOpts ...DefaultRPOpts) (DelegationTokenExc
 	}
 
 	if p.verifier == nil {
-		p.verifier = NewDefaultVerifier(rpConfig.Issuer, rpConfig.ClientID, NewRemoteKeySet(p.httpClient, p.endpoints.JKWsURL))
+		p.verifier = NewDefaultVerifier(rpConfig.Issuer, rpConfig.ClientID, NewRemoteKeySet(p.httpClient, p.endpoints.JKWsURL), p.verifierOpts...)
 	}
 
 	return p, nil
@@ -112,6 +113,12 @@ func WithHTTPClient(client *http.Client) DefaultRPOpts {
 	}
 }
 
+func WithVerifierOpts(opts ...ConfFunc) DefaultRPOpts {
+	return func(p *DefaultRP) {
+		p.verifierOpts = opts
+	}
+}
+
 //AuthURL is the `RelayingParty` interface implementation
 //wrapping the oauth2 `AuthCodeURL`
 //returning the url of the auth request