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java.lang.NullPointerException: 	at org.openstack4j.openstack.internal.OSAuthenticator.authenticateV2(OSAuthenticator.java:71)	at org.openstack4j.openstack.internal.OSAuthenticator.invoke(OSAuthenticator.java:38)	at org.openstack4j.openstack.OSFactory$OSFactoryBuilder.authenticate(OSFactory.java:150)	at bootstrap.OpenstackBootstrap.main(Unknown Source)