java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
        at com.mederov.timelord.SplashActivity$1.run(SplashActivity.java:44)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5345)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:947)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:742)

for (UserInfo user: FirebaseAuth.getInstance().getCurrentUser().getProviderData()) {
                    switch (user.getProviderId()) {
                        case "google.com": {
                            Intent intent = new Intent(SplashActivity.this, MainActivity.class);
                            SplashActivity.this.startActivity(intent);
                            break;
                        }
                        case "password": {
                            Intent intent = new Intent(SplashActivity.this, MainActivity.class);
                            SplashActivity.this.startActivity(intent);
                            break;
                        }
                        default:
                            Intent mainIntent = new Intent(SplashActivity.this, SignInActivity.class);
                            SplashActivity.this.startActivity(mainIntent);
                            SplashActivity.this.finish();

                            break;
                    }

                }