Attempt to do a synchronize operation on a null object

[sryze]

Exception on Android:

2020-04-18 14:46:31.139 8659-8765/com.myapp E/unknown:ReactNative: Exception in native call
    java.lang.NullPointerException: Attempt to do a synchronize operation on a null object
        at com.kevinejohn.RNMixpanel.RNMixpanelModule.identify(RNMixpanelModule.java:206)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
        at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:158)
        at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:29)
        at android.os.Looper.loop(Looper.java:193)
        at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:232)
        at java.lang.Thread.run(Thread.java:764)
2020-04-18 14:46:31.146 8659-8765/com.myapp E/unknown:ReactNative: Exception in native call
    java.lang.NullPointerException: Attempt to do a synchronize operation on a null object
        at com.kevinejohn.RNMixpanel.RNMixpanelModule.trackWithProperties(RNMixpanelModule.java:184)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
        at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:158)
        at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:29)
        at android.os.Looper.loop(Looper.java:193)
        at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:232)
        at java.lang.Thread.run(Thread.java:764)

Version: 1.2.0

It happens when API credeitnals are missing