////////////////////////WRITE

private void setDataCurrentUser(){
        DatabaseReference db = FirebaseDatabase.getInstance().getReference();

        Query query = db.child(getString(R.string.db_Users))
                .orderByKey()
                .equalTo(FirebaseAuth.getInstance().getCurrentUser().getUid());

        query.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for(DataSnapshot single : dataSnapshot.getChildren()){
                    User user = single.getValue(User.class);
                    Log.d(TAG, "Get user from database: " + user.getUid());
                    //email.setText(auth.getCurrentUser().getEmail());
                    name.setText(user.getName() + " " + user.getSurname());
                    email.setText(auth.getCurrentUser().getEmail());
                    setImage(user.getImage());
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }

    private void setImage(String url){
        if(url != null && url.isEmpty() == false){
            Picasso.get()
                    .load(url)
                    .into(avatar);
            Log.d(TAG, "onSetImage: " + url);
        }
    }
,

//////////////////////////////SAVe


      btnSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(successStatus){
                    if(!name.getText().equals("") || !surname.getText().equals("")){
                        FirebaseUtils.connectStorage();

                        progress.show();
                        final StorageReference storageRef = FirebaseUtils.mStorageRef.child(imageUri.getLastPathSegment());
                        storageRef.putFile(imageUri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                            @Override
                            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                                Task<Uri> urlTask = taskSnapshot.getStorage().getDownloadUrl();
                                while (!urlTask.isSuccessful());
                                Uri downloadUrl = urlTask.getResult();

                                url = downloadUrl.toString();
                                Log.d(TAG, "Image Url: " + url);
                                DatabaseReference db = FirebaseDatabase.getInstance().getReference();
                                db.child(getString(R.string.db_Users)).child(currentUser.getUid()).setValue(currentUser).addOnCompleteListener(new OnCompleteListener<Void>() {
                                    @Override
                                    public void onComplete(@NonNull Task<Void> task) {
                                        Log.d(TAG, "onComplete: update current user");
                                        DatabaseReference db = FirebaseDatabase.getInstance().getReference();
                                        db.child(getString(R.string.db_Users)).child(FirebaseAuth.getInstance().getCurrentUser().getUid()).child("name").setValue(name.getText().toString());
                                        db.child(getString(R.string.db_Users)).child(FirebaseAuth.getInstance().getCurrentUser().getUid()).child("surname").setValue(surname.getText().toString());
                                        db.child(getString(R.string.db_Users)).child(FirebaseAuth.getInstance().getCurrentUser().getUid()).child("image").setValue(url);

                                        FirebaseAuth.getInstance().getCurrentUser().updateProfile(UpdateProfile()).addOnCompleteListener(new OnCompleteListener<Void>() {
                                            @Override
                                            public void onComplete(@NonNull Task<Void> task) {
                                                Log.d(TAG, "onComplete: Update Profile");
                                                try {
                                                    String fileName = getResources().getString(R.string.account_settings);
                                                    InputStream input = openFileInput(fileName);
                                                    Properties properties = new Properties();
                                                    properties.load(input);
                                                    properties.setProperty(getResources().getString(R.string.name), name.getText().toString());
                                                    properties.setProperty(getResources().getString(R.string.surname), surname.getText().toString());
                                                    OutputStream out = openFileOutput(getResources().getString(R.string.account_settings), MODE_PRIVATE);
                                                    properties.store(out, null);
                                                    out.close();
                                                    Log.d(TAG, "Added data to config.");
                                                } catch (FileNotFoundException e) {
                                                    e.printStackTrace();
                                                } catch (IOException e) {
                                                    e.printStackTrace();
                                                }
                                                progress.dismiss();
                                                Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                                                startActivity(intent);
                                                finish();
                                            }
                                        });
                                        Toast.makeText(getApplicationContext(), "Personal data is saved",Toast.LENGTH_LONG).show();
                                    }
                                }).addOnFailureListener(new OnFailureListener() {
                                    @Override
                                    public void onFailure(@NonNull Exception e) {
                                        progress.dismiss();
                                        Log.e(TAG, "Cannot save data");
                                        Toast.makeText(getApplicationContext(), "Cannot save data, please try again", Toast.LENGTH_LONG).show();
                                    }
                                });
                                //progress.dismiss();
                            }
                        }).addOnFailureListener(new OnFailureListener() {
                            @Override
                            public void onFailure(@NonNull Exception e) {
                                progress.dismiss();
                                Log.e(TAG, "Error: ", e);
                                Toast.makeText(getApplicationContext(), "Cannot upload image, try again", Toast.LENGTH_LONG).show();
                            }
                        });
                        //progress.dismiss();
                    }
                    else{
                        Toast.makeText(getApplicationContext(), "Fill all fields, please.", Toast.LENGTH_LONG).show();
                    }
                }
                else{
                    Toast.makeText(getApplicationContext(), "Choose image to upload, please.", Toast.LENGTH_LONG).show();
                }
            }
        });