fix: OptionalApiAuthGuard when only client id is provided (#23783)

apps/api/v2/src/modules/auth/guards/optional-api-auth/optional-api-auth.guard.ts

@@ -1,10 +1,19 @@
 import { ApiAuthGuard } from "@/modules/auth/guards/api-auth/api-auth.guard";
-import { NO_AUTH_PROVIDED_MESSAGE } from "@/modules/auth/strategies/api-auth/api-auth.strategy";
+import {
+  NO_AUTH_PROVIDED_MESSAGE,
+  ONLY_CLIENT_ID_PROVIDED_MESSAGE,
+} from "@/modules/auth/strategies/api-auth/api-auth.strategy";
 
 export class OptionalApiAuthGuard extends ApiAuthGuard {
   handleRequest(error: Error, user: any) {
     // note(Lauris): optional means that auth is not required but if it is invalid then still throw error.
     const noAuthProvided = error && error.message.includes(NO_AUTH_PROVIDED_MESSAGE);
+    const onlyClientIdProvided = error && error.message.includes(ONLY_CLIENT_ID_PROVIDED_MESSAGE);
+
+    if (onlyClientIdProvided) {
+      return null;
+    }
+
     if (user || noAuthProvided || !error) {
       return user || null;
     } else {