output: #fixed code
                                  @Test
      public void testFromSettingsSimple() throws MojoExecutionException {
          setupServers();
          AuthConfig config = factory.createAuthConfig(isPush, null, settings, "roland", "test.org");
          assertNotNull(config);
          verifyAuthConfig(config, "roland", "secret", "roland@jolokia.org");
      }
input: #vulnerable code 
                                  @Test
      public void testFromSettingsSimple() throws MojoExecutionException {
          setupServers();
          AuthConfig config = factory.createAuthConfig(null,settings, "roland", "test.org");
          assertNotNull(config);
          verifyAuthConfig(config, "roland", "secret", "roland@jolokia.org");
      } 
                              #location 6 
                              #vulnerability type NULL_DEREFERENCE