fix(authn): subfolder api is considered as a wrong origin(closes #6294 in #6301)

internal/authn/authn.go

@@ -1,6 +1,7 @@
 package authn
 
 import (
+	"fmt"
 	"net/http"
 	"net/url"
 
@@ -19,7 +20,7 @@ func NewAuthnInstance(r *http.Request) (*webauthn.WebAuthn, error) {
 		RPDisplayName: setting.GetStr(conf.SiteTitle),
 		RPID:          siteUrl.Hostname(),
 		//RPOrigin:      siteUrl.String(),
-		RPOrigins: []string{siteUrl.String()},
+		RPOrigins: []string{fmt.Sprintf("%s://%s", siteUrl.Scheme, siteUrl.Host)},
 		// RPOrigin: "http://localhost:5173"
 	})
 }