[WEBHOOK] Error response 400: com.fasterxml.jackson.databind.JsonMappingException: Cannot invoke "org.keycloak.models.UserModel.getId()" because the return value of "io.phasetwo.keycloak.model.WebhookModel.getCreatedBy()" is null

[Sebastian-Gil-wcq]

Unable to fetch webhooks in case of one of them was create by a removed user. Since there is no option to remove all webhooks, this can block entire functionality in case operator does not have right to manually update Keycloak database

Steps to reproduce:

1. create client with events management permissions
2. create hook using client from point 1
3. delete client from point 2
4. call GET /auth/realms/:realm/webhooks to fetch realms

2024-04-22 05:33:01,323 DEBUG [org.keycloak.services.error.KeycloakErrorHandler] (executor-thread-1) Error response 400: com.fasterxml.jackson.databind.JsonMappingException: Cannot invoke "org.keycloak.models.UserModel.getId()" because the return value of "io.phasetwo.keycloak.model.WebhookModel.getCreatedBy()" is null at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._wrapAsIOE(DefaultSerializerProvider.java:531) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:504) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:341) at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1572) at com.fasterxml.jackson.databind.ObjectWriter._writeValueAndClose(ObjectWriter.java:1273) at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1098) at io.quarkus.resteasy.reactive.jackson.runtime.serialisers.FullyFeaturedServerJacksonMessageBodyWriter.writeResponse(FullyFeaturedServerJacksonMessageBodyWriter.java:79) at org.jboss.resteasy.reactive.server.core.ServerSerialisers.invokeWriter(ServerSerialisers.java:216) at org.jboss.resteasy.reactive.server.core.ServerSerialisers.invokeWriter(ServerSerialisers.java:184) at org.jboss.resteasy.reactive.server.core.serialization.FixedEntityWriter.write(FixedEntityWriter.java:28) at org.jboss.resteasy.reactive.server.handlers.ResponseWriterHandler.handle(ResponseWriterHandler.java:34) at io.quarkus.resteasy.reactive.server.runtime.QuarkusResteasyReactiveRequestContext.invokeHandler(QuarkusResteasyReactiveRequestContext.java:147) at org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:147) at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:582) at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2513) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1538) at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29) at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.base/java.lang.Thread.run(Thread.java:840)

[xgp]

Good catch. Looks like a bug. We can fix this week, but feel free to PR in the meantime if it is urgent for you.