Post authentication

app/src/main/java/eu/faircode/email/ActivityMain.java

@@ -357,6 +357,9 @@ public class ActivityMain extends ActivityBase implements FragmentManager.OnBack
             }.setExecutor(executor);
 
             if (Helper.shouldAuthenticate(this, false))
+                getMainHandler().post(new RunnableEx("authenticate") {
+                    @Override
+                    public void delegate() {
                         Helper.authenticate(ActivityMain.this, ActivityMain.this, null,
                                 new RunnableEx("auth:succeeded") {
                                     @Override
@@ -402,6 +405,8 @@ public class ActivityMain extends ActivityBase implements FragmentManager.OnBack
                                         }
                                     }
                                 });
+                    }
+                });
             else
                 boot.execute(this, new Bundle(), "main:accounts");
         } else {