Handle user step for not existing user

Description

We should display non active user information for non active user step

[000000007234d4e9] 2024-04-24T18:32:35.182+02:00 ERROR 2790384 --- [XNIO-1 task-2] io.undertow.request                      : UT005023: Exception handling request to /dashboard.htmljakarta.servlet.ServletException: Request processing failed: java.lang.NullPointerException: Cannot invoke "ovh.atlasinc.ap.model.path.step.StepApprovalPathUser.getDisplayName()" because "user" is null    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1019)    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)    at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:527)    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)    at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)    at org.springframework.web.filter.ServerHttpObservationFilter.doFilterInternal(ServerHttpObservationFilter.java:109)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)    at org.springframework.web.filter.ForwardedHeaderFilter.doFilterInternal(ForwardedHeaderFilter.java:153)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)    at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)    at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)    at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)    at io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:276)    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:132)    at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)    at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:256)    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:101)    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:393)    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:859)    at org.jboss.threads.ContextHandler$1.runWith(ContextHandler.java:18)    at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2513)    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1538)    at org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1282)    at java.base/java.lang.Thread.run(Thread.java:1583)Caused by: java.lang.NullPointerException: Cannot invoke "ovh.atlasinc.ap.model.path.step.StepApprovalPathUser.getDisplayName()" because "user" is null    at ovh.atlasinc.ap.model.path.ApprovalPathUtil.lambda$appendUserDetails$6(ApprovalPathUtil.java:79)    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)    at java.base/java.util.AbstractList$RandomAccessSpliterator.forEachRemaining(AbstractList.java:722)    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575)    at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)    at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616)    at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622)    at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627)    at ovh.atlasinc.ap.model.path.ApprovalPathUtil.appendUserDetails(ApprovalPathUtil.java:95)    at ovh.atlasinc.ap.web.dashboard.DashboardViewController.get(DashboardViewController.java:231)    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)    at java.base/java.lang.reflect.Method.invoke(Method.java:580)    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884)    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081)    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)    ... 56 common frames omitted