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java.lang.NullPointerException: 	at spark.Response.cookie(Response.java:235)	at spark.Response.cookie(Response.java:203)	at com.costrategix.microservices.authentication.App.lambda$3(App.java:89)	at spark.RouteImpl$1.handle(RouteImpl.java:61)	at spark.http.matching.Routes.execute(Routes.java:61)	at spark.http.matching.MatcherFilter.doFilter(MatcherFilter.java:126)	at spark.embeddedserver.jetty.JettyHandler.doHandle(JettyHandler.java:50)	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)	at org.eclipse.jetty.server.Server.handle(Server.java:517)	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261)	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)	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(Thread.java:745)