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org.apache.jasper.el.JspELException: /index.jsp(50,2) '#{MailSenderBean.send}' java.lang.NullPointerException
java.lang.NullPointerException: 	at beans.Controller.checkAuthentication(Controller.java:157)	at pagecode.Login.doBtnLoginAction(Login.java:72)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)	at java.lang.reflect.Method.invoke(Method.java:611)	at org.apache.el.parser.AstValue.invoke(AstValue.java:268)	at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)	at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:70)	at javax.faces.component._MethodExpressionToMethodBinding.invoke(_MethodExpressionToMethodBinding.java:88)	at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:100)	at javax.faces.component.UICommand.broadcast(UICommand.java:120)	at javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:973)	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:275)	at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1285)	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:711)	at org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:34)	at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:172)	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:119)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1227)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:776)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:458)	at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1032)	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:909)	at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:200)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:459)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:526)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:312)	at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:88)	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)	at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1862)