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Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
java.lang.NullPointerException: null	at java.net.URLEncoder.encode(URLEncoder.java:204)	at twitter4j.HttpParameter.encode(HttpParameter.java:261)	at twitter4j.auth.OAuthAuthorization.encodeParameters(OAuthAuthorization.java:411)	at twitter4j.auth.OAuthAuthorization.encodeParameters(OAuthAuthorization.java:394)	at twitter4j.auth.OAuthAuthorization.normalizeRequestParameters(OAuthAuthorization.java:378)	at twitter4j.auth.OAuthAuthorization.generateAuthorizationHeader(OAuthAuthorization.java:225)	at twitter4j.auth.OAuthAuthorization.generateAuthorizationHeader(OAuthAuthorization.java:277)	at twitter4j.auth.OAuthAuthorization.getAuthorizationHeader(OAuthAuthorization.java:66)	at twitter4j.HttpClientImpl.setHeaders(HttpClientImpl.java:208)	at twitter4j.HttpClientImpl.handleRequest(HttpClientImpl.java:91)	at twitter4j.HttpClientBase.request(HttpClientBase.java:53)	at twitter4j.HttpClientBase.post(HttpClientBase.java:82)	at twitter4j.auth.OAuthAuthorization.getOAuthAccessToken(OAuthAuthorization.java:139)	at twitter4j.auth.OAuthAuthorization.getOAuthAccessToken(OAuthAuthorization.java:159)	at twitter4j.TwitterBaseImpl.getOAuthAccessToken(TwitterBaseImpl.java:370)	at com.website.talent.service.external.TwitterServiceImpl.storeAccessToken(TwitterServiceImpl.java:111)	at com.website.talent.rest.ExternalRestService.confirmTwitterAuth(ExternalRestService.java:65)	at com.website.talent.rest.ExternalRestService$$FastClassBySpringCGLIB$$248309c.invoke()	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:649)	at com.website.talent.rest.ExternalRestService$$EnhancerBySpringCGLIB$$53497dbc.confirmTwitterAuth()	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:497)	at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)	at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160)