com.glympse.android.api.GGlympse.getUserManager()' on a null object reference

[githubmss]

Just running your sample project inside me studio.It's coming with every login and even with skip login process

Getting bellow mentioned error :-

FATAL EXCEPTION: main
Process: com.glympse.android.demo.accountlinking, PID: 14167
java.lang.RuntimeException: Unable to resume activity {com.glympse.android.demo.accountlinking/com.glympse.android.demo.accountlinking.LinkedAccountsActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'com.glympse.android.api.GUserManager com.glympse.android.api.GGlympse.getUserManager()' on a null object reference
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3458)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3498)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2763)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1504)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:163)
at android.app.ActivityThread.main(ActivityThread.java:6237)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:877)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'com.glympse.android.api.GUserManager com.glympse.android.api.GGlympse.getUserManager()' on a null object reference
at com.glympse.android.demo.accountlinking.LinkedAccountsActivity.onResume(LinkedAccountsActivity.java:98)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1270)
at android.app.Activity.performResume(Activity.java:6960)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3435)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3498) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2763) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1504) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:163) 
at android.app.ActivityThread.main(ActivityThread.java:6237) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:877) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)