private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
    Log.d(TAG, "firebaseAuthWithGoogle:" + acct.getId());

    AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
    firebaseAuth.signInWithCredential(credential)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        try {
                            sleep(1000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        // Sign in success, update UI with the signed-in user's information
                        Log.d(TAG, "signInWithCredential:success");
                        FirebaseUser user = firebaseAuth.getCurrentUser();
                        databaseReference = FirebaseDatabase.getInstance().getReference().child("users").child(user.getUid());
                        databaseReference.child("fullName").setValue(user.getDisplayName());
                        databaseReference.child("email").setValue(user.getEmail());
                        databaseReference.child("profile").setValue(user.getPhotoUrl() != null ? user.getPhotoUrl().toString() : null);
                            databaseReference.addValueEventListener(new ValueEventListener() {
                            @Override
                            public void onDataChange(DataSnapshot dataSnapshot) {
                                Profile profile = dataSnapshot.getValue(Profile.class);
                                if (dataSnapshot.exists()) {
                                    if (profile.getUserType() != null) {
                                        Log.e("key", dataSnapshot.getKey());
                                        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(SignInActivity.this);
                                        SharedPreferences.Editor editor = sharedPreferences.edit();
                                        if (profile != null) {
                                            editor.putString(Preferences.EMAIL, profile.getEmail());
                                            editor.putString(Preferences.NAME, profile.getFullName());
                                            editor.putString(Preferences.USER_TYPE, profile.getUserType());
                                        }
                                        editor.putString(Preferences.USERID, getUid());
                                        editor.apply();

                                        Intent loginIntent = new Intent(SignInActivity.this, MainMenuActivity.class);
                                        try {
                                            sleep(1000);
                                        } catch (InterruptedException e) {
                                            e.printStackTrace();
                                        }
                                        startActivity(loginIntent);
                                        finish();
                                    } else {
                                        Intent contactIntent = new Intent(SignInActivity.this, ContactDetailsActivity.class);
                                        contactIntent.putExtra("userEmailAddress", profile.getEmail());
                                        startActivity(contactIntent);
                                        finish();
                                    }
                                } else {
                                    Toast.makeText(SignInActivity.this, "Snapshot not yet saved", Toast.LENGTH_SHORT).show();
                                }
                                Log.e("key", dataSnapshot.getKey());
                            }

                            @Override
                            public void onCancelled(DatabaseError databaseError) {

                            }
                        });
                        //updateUI(user);
                    } else {
                        // If sign in fails, display a message to the user.
                        Log.w(TAG, "signInWithCredential:failure", task.getException());
                        Toast.makeText(SignInActivity.this, "Authentication failed.",
                                Toast.LENGTH_SHORT).show();
                        //updateUI(null);
                    }

                }
            });
}

// Google Sign In Integration - End


private void signInUser() {
    String email = emailLoginTextInputEditText.getText().toString();
    String password = passwordLoginEditText.getText().toString();

    if (!validateEmail(email)) {
        return;
    }
    if (!validateSetPass(password)) {
        return;
    }
    showProgressDialog("Signing in...");
    firebaseAuth.signInWithEmailAndPassword(email, password)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (!task.isSuccessful()) {
                        hideProgressDialog();
                        Toast.makeText(SignInActivity.this, task.getException().getMessage(),
                                Toast.LENGTH_SHORT).show();

                    } else if (task.isSuccessful()) {
                        hideProgressDialog();
                        DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child("users").child(getUid());
                        databaseReference.addValueEventListener(new ValueEventListener() {
                            @Override
                            public void onDataChange(DataSnapshot dataSnapshot) {
                                Profile profile = dataSnapshot.getValue(Profile.class);
                                Log.e("key", dataSnapshot.getKey());
                                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(SignInActivity.this);
                                SharedPreferences.Editor editor = sharedPreferences.edit();
                                if (profile != null) {
                                    editor.putString(Preferences.EMAIL, profile.getEmail());
                                    editor.putString(Preferences.NAME, profile.getFullName());
                                    editor.putString(Preferences.USER_TYPE, profile.getUserType());
                                }
                                editor.putString(Preferences.USERID, getUid());
                                editor.apply();
                            }

                            @Override
                            public void onCancelled(DatabaseError databaseError) {

                            }
                        });
                        Intent loginIntent = new Intent(SignInActivity.this, MainMenuActivity.class);
                        loginIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                        try {
                            sleep(1000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        startActivity(loginIntent);
                        finish();
                    }
                }
            });
}