title: Firestore Null Pointer Exception on firestoreoptions.getService
body: <p>Hi i am using SmartFoxServer with a Java extension. Inside that extension i am trying to get firestore instance. Below is the code i am using to connect to service that is working fine inside IDE (Eclipse). but when i deploy my extension on SmartFoxServer it gives a null pointer exception on firestoreOptions.getService</p>
  
  <pre><code>String jsonPath = "data/************.json";
          GoogleCredentials credentials = null;
              try {
                  credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))
                          .createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));
              } catch (FileNotFoundException e1) {
                  trace("Exception" + e1.toString());
              } catch (IOException e1) {
                  trace("Exception" + e1.toString());
              }
  
              FirestoreOptions firestoreOptions = FirestoreOptions.newBuilder().setCredentials(credentials).build();
  
              Firestore db = firestoreOptions.getService();
              this.db = db;
              try {
                  run();
              } catch (Exception e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
                  trace("Exception : " + e);
              }
  </code></pre>
  
  <p>Here is the exception i am getting.</p>
  
  <pre><code>    com.google.cloud.firestore.FirestoreException:
  ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
  Exception: com.google.cloud.firestore.FirestoreException
  Message: java.lang.NullPointerException
  Description: Extension initialization failed.
  +--- --- ---+
  Stack Trace:
  +--- --- ---+
  com.google.cloud.firestore.FirestoreException.networkException(FirestoreException.java:70)
  com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreRpcFactory.create(FirestoreOptions.java:81)
  com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreRpcFactory.create(FirestoreOptions.java:71)
  com.google.cloud.ServiceOptions.getRpc(ServiceOptions.java:506)
  com.google.cloud.firestore.FirestoreOptions.getFirestoreRpc(FirestoreOptions.java:306)
  com.google.cloud.firestore.FirestoreImpl.&lt;init&gt;(FirestoreImpl.java:76)
  com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreFactory.create(FirestoreOptions.java:62)
  com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreFactory.create(FirestoreOptions.java:55)
  com.google.cloud.ServiceOptions.getService(ServiceOptions.java:493)
  sfs2x.extension.game.quiz.QuizExtension.init(QuizExtension.java:159)
  com.smartfoxserver.v2.entities.managers.SFSExtensionManager.createExtension(SFSExtensionManager.java:303)
  com.smartfoxserver.v2.entities.managers.SFSZoneManager.createZone(SFSZoneManager.java:426)
  </code></pre>
  
  <p>i am new to firestore. Don't know if any jar file/library is missing to run this code on server. any help would be appreciated.</p>