NPE for currentUser in ConversationsListActivity

[mahibi]

Exception java.lang.NullPointerException:
  at com.nextcloud.talk.conversationlist.ConversationsListActivity.addToConversationItems (ConversationsListActivity.kt:851)
  at com.nextcloud.talk.conversationlist.ConversationsListActivity.access$addToConversationItems (ConversationsListActivity.kt:151)
  at com.nextcloud.talk.conversationlist.ConversationsListActivity$initObservers$5$1.invokeSuspend (ConversationsListActivity.kt:394)
  at com.nextcloud.talk.conversationlist.ConversationsListActivity$initObservers$5$1.invoke (Unknown Source:8)
  at com.nextcloud.talk.conversationlist.ConversationsListActivity$initObservers$5$1.invoke (Unknown Source:4)

v20.1.0

[mahibi]

An other NPE reported by gplay for 20.1.0, caused by currentUser being null:

Exception java.lang.RuntimeException:
  at android.app.ActivityThread.performResumeActivity (ActivityThread.java:5427)
  at android.app.ActivityThread.handleResumeActivity (ActivityThread.java:5508)
  at android.app.servertransaction.ResumeActivityItem.execute (ResumeActivityItem.java:57)
  at android.app.servertransaction.ActivityTransactionItem.execute (ActivityTransactionItem.java:45)
  at android.app.servertransaction.TransactionExecutor.executeLifecycleState (TransactionExecutor.java:180)
  at android.app.servertransaction.TransactionExecutor.execute (TransactionExecutor.java:98)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2685)
  at android.os.Handler.dispatchMessage (Handler.java:106)
  at android.os.Looper.loopOnce (Looper.java:230)
  at android.os.Looper.loop (Looper.java:319)
  at android.app.ActivityThread.main (ActivityThread.java:8919)
  at java.lang.reflect.Method.invoke
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:578)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1103)
Caused by java.lang.NullPointerException:
  at com.nextcloud.talk.conversationlist.ConversationsListActivity.shouldShowNotificationWarning (ConversationsListActivity.kt:1557)
  at com.nextcloud.talk.conversationlist.ConversationsListActivity.showNotificationWarning (ConversationsListActivity.kt:1507)
  at com.nextcloud.talk.conversationlist.ConversationsListActivity.onResume (ConversationsListActivity.kt:278)
  at android.app.Instrumentation.callActivityOnResume (Instrumentation.java:1603)
  at android.app.Activity.performResume (Activity.java:9134)
  at android.app.ActivityThread.performResumeActivity (ActivityThread.java:5399)