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Using keycloak api for a public client

Working on a project where there is a frontend (React) and a backend (Java/Quarkus). Keycloak is used as the auth tool. It is configured with a realm that has a public client on it. This allows the user to login via the browser and then make api requests to the backend with a bearer token attached to the request.
Running into a problem where we want to add users to our application. This means we also need to add them to keycloak. Doing this programatically, this is in its own mini module and it uses the keycloak-admin-client library.
I initiate the instance with
instance = KeycloakBuilder.builder()
.serverUrl(props.getProperty(PropertyConstants.SERVER_URL))
.realm(props.getProperty(PropertyConstants.REALM))
.grantType(OAuth2Constants.PASSWORD)
.clientId(props.getProperty(PropertyConstants.CLIENT_ID))
.username(props.getProperty(PropertyConstants.USERNAME))
.password(props.getProperty(PropertyConstants.PASSWORD))
.build();
realmResource = instance.realm(props.getProperty(PropertyConstants.REALM));
usersResource = realmResource.users();
UserRepresentation user = createUserRep();
Response response = usersResource.create(user);
The stacktrace is;
org.jboss.resteasy.spi.UnhandledException: javax.ws.rs.ProcessingException: RESTEASY004655: Unable to invoke request: javax.ws.rs.ProcessingException: RESTEASY003215: could not find writer for content-type application/x-www-form-urlencoded type: javax.ws.rs.core.Form$1
at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:106)
at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:372)
at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:218)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:519)
at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:261)
at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:161)
at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364)
at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:164)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:247)
at io.quarkus.resteasy.runtime.standalone.RequestDispatcher.service(RequestDispatcher.java:73)
at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.dispatch(VertxRequestHandler.java:136)
at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.access$000(VertxRequestHandler.java:40)
at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler$1.run(VertxRequestHandler.java:97)
at io.quarkus.runtime.CleanableExecutor$CleaningRunnable.run(CleanableExecutor.java:231)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2046)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1578)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1452)
at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
at java.base/java.lang.Thread.run(Thread.java:829)
at org.jboss.threads.JBossThread.run(JBossThread.java:479)
Caused by: javax.ws.rs.ProcessingException: RESTEASY004655: Unable to invoke request: javax.ws.rs.ProcessingException: RESTEASY003215: could not find writer for content-type application/x-www-form-urlencoded type: javax.ws.rs.core.Form$1
at org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine.invoke(ManualClosingApacheHttpClient43Engine.java:287)
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:488)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invokeSync(ClientInvoker.java:149)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:112)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
at com.sun.proxy.$Proxy89.grantToken(Unknown Source)
at org.keycloak.admin.client.token.TokenManager.grantToken(TokenManager.java:90)
at org.keycloak.admin.client.token.TokenManager.getAccessToken(TokenManager.java:70)
at org.keycloak.admin.client.token.TokenManager.getAccessTokenString(TokenManager.java:65)
at org.keycloak.admin.client.resource.BearerAuthFilter.filter(BearerAuthFilter.java:52)
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.filterRequest(ClientInvocation.java:683)
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:485)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invokeSync(ClientInvoker.java:149)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:112)
at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76)
at com.sun.proxy.$Proxy96.create(Unknown Source)
at com.demservices.KeycloakWrapper.addUser(KeycloakWrapper.java:56)
at com.demservices.services.UserService.addUser(UserService.java:27)
at com.demservices.services.UserService_Subclass.addUser$$superaccessor2(UserService_Subclass.zig:492)
at com.demservices.services.UserService_Subclass$$function$$2.apply(UserService_Subclass$$function$$2.zig:33)
at io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:54)
at io.quarkus.narayana.jta.runtime.interceptor.TransactionalInterceptorBase.invokeInOurTx(TransactionalInterceptorBase.java:127)
at io.quarkus.narayana.jta.runtime.interceptor.TransactionalInterceptorBase.invokeInOurTx(TransactionalInterceptorBase.java:100)
at io.quarkus.narayana.jta.runtime.interceptor.TransactionalInterceptorRequired.doIntercept(TransactionalInterceptorRequired.java:32)
at io.quarkus.narayana.jta.runtime.interceptor.TransactionalInterceptorBase.intercept(TransactionalInterceptorBase.java:53)
at io.quarkus.narayana.jta.runtime.interceptor.TransactionalInterceptorRequired.intercept(TransactionalInterceptorRequired.java:26)
at io.quarkus.narayana.jta.runtime.interceptor.TransactionalInterceptorRequired_Bean.intercept(TransactionalInterceptorRequired_Bean.zig:340)
at io.quarkus.arc.impl.InterceptorInvocation.invoke(InterceptorInvocation.java:41)
at io.quarkus.arc.impl.AroundInvokeInvocationContext.perform(AroundInvokeInvocationContext.java:41)
at io.quarkus.arc.impl.InvocationContexts.performAroundInvoke(InvocationContexts.java:32)
at com.demservices.services.UserService_Subclass.addUser(UserService_Subclass.zig:440)
at com.demservices.services.UserService_ClientProxy.addUser(UserService_ClientProxy.zig:251)
at com.demservices.controllers.UserController.createNewUser(UserController.java:35)
at com.demservices.controllers.UserController_Subclass.createNewUser$$superaccessor1(UserController_Subclass.zig:234)
at com.demservices.controllers.UserController_Subclass$$function$$1.apply(UserController_Subclass$$function$$1.zig:33)
at io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:54)
at io.quarkus.hibernate.validator.runtime.interceptor.AbstractMethodValidationInterceptor.validateMethodInvocation(AbstractMethodValidationInterceptor.java:69)
at io.quarkus.hibernate.validator.runtime.jaxrs.JaxrsEndPointValidationInterceptor.validateMethodInvocation(JaxrsEndPointValidationInterceptor.java:35)
at io.quarkus.hibernate.validator.runtime.jaxrs.JaxrsEndPointValidationInterceptor_Bean.intercept(JaxrsEndPointValidationInterceptor_Bean.zig:392)
at io.quarkus.arc.impl.InterceptorInvocation.invoke(InterceptorInvocation.java:41)
at io.quarkus.arc.impl.AroundInvokeInvocationContext.perform(AroundInvokeInvocationContext.java:41)
at io.quarkus.arc.impl.InvocationContexts.performAroundInvoke(InvocationContexts.java:32)
at com.demservices.controllers.UserController_Subclass.createNewUser(UserController_Subclass.zig:191)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
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.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:170)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:130)
at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:643)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:507)
at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$2(ResourceMethodInvoker.java:457)
at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:459)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:419)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:393)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:68)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:492)
... 20 more
Caused by: javax.ws.rs.ProcessingException: RESTEASY003215: could not find writer for content-type application/x-www-form-urlencoded type: javax.ws.rs.core.Form$1
at org.jboss.resteasy.core.interception.jaxrs.ClientWriterInterceptorContext.throwWriterNotFoundException(ClientWriterInterceptorContext.java:50)
at org.jboss.resteasy.core.interception.jaxrs.AbstractWriterInterceptorContext.getWriter(AbstractWriterInterceptorContext.java:302)
at org.jboss.resteasy.core.interception.jaxrs.AbstractWriterInterceptorContext.syncProceed(AbstractWriterInterceptorContext.java:240)
at org.jboss.resteasy.core.interception.jaxrs.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:224)
at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.writeRequestBody(ClientInvocation.java:440)
at org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine.writeRequestBodyToOutputStream(ManualClosingApacheHttpClient43Engine.java:589)
at org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine.buildEntity(ManualClosingApacheHttpClient43Engine.java:548)
at org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine.loadHttpMethod(ManualClosingApacheHttpClient43Engine.java:455)
at org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine.invoke(ManualClosingApacheHttpClient43Engine.java:265)
... 77 more
I see in any example that a clientSecret is required but that is for confidential clients. I don't want this, I need the client to be public.
How can I have a public client while also being able to make API calls to it?

Spring Neo4j - Cannot access unmanaged extension

I've deployed a Neo4j unmanaged extension. The unmanaged extension can be called using REST Client and successfully returned the result. The problem is when I try to call / invoke the unmanaged extension from another java class, it keep on throwing the 401 Unauthorized.
I used Spring RestTemplate to invoke the unmanaged extension.
My codes :
RestTemplate restTemplate = new RestTemplate();
PostPhotoRest postPhotoRest = restTemplate.getForObject("http://myneo4jusername:myneo4jpassword#localhost:7474/extension/servicetwo/postphoto/55b12d35-94fd-4297-bb18-e6040d7b7109", PostPhotoRest.class);
Full Error :
Caused by: org.springframework.web.client.HttpClientErrorException: 401 Unauthorized
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91) ~[spring-web-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:668) ~[spring-web-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:621) ~[spring-web-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:581) ~[spring-web-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:288) ~[spring-web-4.3.0.RC2.jar:4.3.0.RC2]
at my.winapp.hashtagmanipulation.worker.RabbitMQWorker.processMessage(RabbitMQWorker.java:76) ~[classes/:na]
at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_66]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_66]
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-messaging-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:115) ~[spring-messaging-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:48) ~[spring-rabbit-1.5.5.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:112) ~[spring-rabbit-1.5.5.RELEASE.jar:na]
... 12 common frames omitted

The driver configuration can supply the URI and credentials configured in ogm.properties.
Components.driver().getConfiguration().getURI();
Components.driver().getConfiguration().getCredentials();

web service: java.io.IOException: Server returned HTTP response code: 500 for URL

i'm trying to use a cxf web service. i have a java sample in intelliJ and when i run it, every thing is ok. but when i try to invoke web service in a java web project(Struts2 and spring framework) i got this exception. every thing is same in both code. and both are running in same client.
Can any body tell me what went wrong ?
org.apache.cxf.interceptor.Fault: Could not send Message.
at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:64)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
.
.
.
`Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: http://servicebus......
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
`.
.
.
.
.
Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: http://servicebus......
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:2081)
... 111 more
code i used is below:
CustomsDebtService customsDebtService = new CustomsDebtService();
CustomsDebt debtWebService = customsDebtService.getCustomsDebtPort();
java.util.Map<String, Object> ctx = ((BindingProvider) debtWebServicePort).getRequestContext();
ctx.put("ws-security.signature.properties", "keystore.properties");
ctx.put("ws-security.encryption.properties", "truststore.properties");
ctx.put("ws-security.encryption.username", "servicebus.ecogif.XX");
ctx.put("ws-security.asymmetric.signature.algorithm", "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256");
ctx.put("ws-security.callback-handler", "externalWebService.XXX.newDebts.CertificatePasswordCallbackHandler");
PersonDebtInquiryResult personDebtInquiryResult;
if (Empty.isNotEmpty(iricaDebtsInquiry.getNationalCode()))
{
personDebtInquiryResult=debtWebService.personDebtInquiryByNationalID("000000001");
}
exception occurs in last line.
all addresses are correct.
also there is some .jks file for config that i put them in ctx (in code). what is the correct path of this file so that can be understand by code. is it possible that problem occurs because of wrong path?

Jetty 9.3.3: ClosedChannelException when using HTTPS

I am using Jetty HTTP client to send request via HTTPS, I configured the HTTP client to use SSL as the following:
httpClient = new HttpClient(new SslContextFactory());
httpClient.setFollowRedirects(false);
httpClient.start();
Request request = httpClient.newRequest(url);
request.method(HttpMethod.GET);
response = request.send();
httpClient.stop();
But I got this exception:
java.util.concurrent.ExecutionException: java.nio.channels.ClosedChannelException
at org.eclipse.jetty.client.util.FutureResponseListener.getResult(FutureResponseListener.java:118)
at org.eclipse.jetty.client.util.FutureResponseListener.get(FutureResponseListener.java:101)
at org.eclipse.jetty.client.HttpRequest.send(HttpRequest.java:653)
at egm.httpClient.jetty.TestBackend.POST(TestBackend.java:206)
at egm.httpClient.jetty.TestStep.execute(TestStep.java:77)
at egm.httpClient.jetty.TestSuite.execute(TestSuite.java:57)
at egm.httpClient.jetty.TestLauncher.main(TestLauncher.java:139)
Caused by: java.nio.channels.ClosedChannelException
at org.eclipse.jetty.io.FillInterest.onClose(FillInterest.java:135)
at org.eclipse.jetty.io.AbstractEndPoint.onClose(AbstractEndPoint.java:116)
at org.eclipse.jetty.io.SelectorManager.endPointClosed(SelectorManager.java:295)
at org.eclipse.jetty.io.ManagedSelector$2.run(ManagedSelector.java:432)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
at java.lang.Thread.run(Unknown Source)

Missing body length in response to SWE request

I am getting this exception while invoking the webservice. Any help is appreciated.
org.apache.axis2.AxisFault: Error Code: 10944629 Error Message: Error: Missing body length in response to SWE request!
at org.apache.axis2.util.Utils.getInboundFaultFromMessageContext(Utils.java:531)
at org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:375)
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:421)
at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229)
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165)
at com.siebel.asi.SOV_Siebel_Contact_AddressStub.queryByExample_1(SOV_Siebel_Contact_AddressStub.java:220)
at com.siebel.xml.sovcontactaddressinfoio.TestService.checkService(TestService.java:31)
at com.hbe.vt.action.LinkAction.executeDisplayPaymentMethods(LinkAction.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)