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java.lang.NullPointerException: null	at ch.heig.amt.g4mify.util.CounterAggregator.aggregate(CounterAggregator.java:45)	at ch.heig.amt.g4mify.util.CounterAggregator$$FastClassBySpringCGLIB$$c3d3221b.invoke()	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656)	at ch.heig.amt.g4mify.util.CounterAggregator$$EnhancerBySpringCGLIB$$5184baa8.aggregate()	at ch.heig.amt.g4mify.api.UsersApi.lambda$null$3(UsersApi.java:185)	at java.util.Optional.map(Optional.java:215)	at ch.heig.amt.g4mify.api.UsersApi.lambda$counter$4(UsersApi.java:185)	at java.util.Optional.flatMap(Optional.java:241)	at ch.heig.amt.g4mify.api.UsersApi.counter(UsersApi.java:183)	at ch.heig.amt.g4mify.api.UsersApi$$FastClassBySpringCGLIB$$fa576528.invoke()	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:652)	at ch.heig.amt.g4mify.api.UsersApi$$EnhancerBySpringCGLIB$$db3953ef.counter()	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:207)	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:826)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:964)	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:856)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:841)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at ch.heig.amt.g4mify.config.security.DomainAuthenticationFilter.doFilterInternal(DomainAuthenticationFilter.java:64)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)