# \[Bug\] Using deprecated 'credentials' format in JSON representation for user

**URL:** <https://forum.keycloak.org/t/bug-using-deprecated-credentials-format-in-json-representation-for-user/10777>\
**Category:** Miscellanaeous\
**Created:** [August 31, 2021, 8:19am UTC](https://forum.keycloak.org/t/bug-using-deprecated-credentials-format-in-json-representation-for-user/10777 "2021-08-31T08:19:29Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![oedam](https://avatars.discourse-cdn.com/v4/letter/o/b5a626/32.png) [@oedam](https://forum.keycloak.org/u/oedam)\
**Post date:** [August 31, 2021, 8:19am UTC](https://forum.keycloak.org/t/bug-using-deprecated-credentials-format-in-json-representation-for-user/10777/1 "2021-08-31T08:19:29Z")

</div>

We have noticed a lot of errors on our Keycloak instance:

```auto
08:18:51,475 WARN [org.keycloak.models.utils.RepresentationToModel] (default task-85) Using deprecated 'credentials' format in JSON representation for user '485762427@qq.com'. It will be removed in future versions
08:18:51,476 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-85) Uncaught server error: java.lang.NullPointerException
at org.keycloak.keycloak-server-spi-private@13.0.1//org.keycloak.models.utils.RepresentationToModel.convertDeprecatedCredentialsFormat(RepresentationToModel.java:972)
at org.keycloak.keycloak-server-spi-private@13.0.1//org.keycloak.models.utils.RepresentationToModel.createCredentials(RepresentationToModel.java:1873)
at org.keycloak.keycloak-services@13.0.1//org.keycloak.services.resources.admin.UsersResource.createUser(UsersResource.java:161)
at jdk.internal.reflect.GeneratedMethodAccessor950.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:138)
at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:546)
at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:435)
at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:396)
at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:398)

```

We are trying to save a user:

```auto
{
// ...
credentials: [{ type: 'password', value: 'mypassword', temporary: false }]
}

```

We are using this image and version of keycloak:

```auto
bitnami/keycloak:13.0.1

```

---

<div class="post-metadata">

**Author:** ![armujahid](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/armujahid/32/4802_2.png) [@armujahid](https://forum.keycloak.org/u/armujahid)\
**Post date:** [March 24, 2022, 1:29pm UTC](https://forum.keycloak.org/t/bug-using-deprecated-credentials-format-in-json-representation-for-user/10777/2 "2022-03-24T13:29:45Z")

</div>

Related: [Adding Custom Credential Type](http://forum.keycloak.org/t/adding-custom-credential-type/10128)