Cant set data to firebase using angularfitr2

i’m trying to save user profile to firebase. but i’m getting this error

TypeError: this.profileObject.set is not a function

My data.provider is as follows

// import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { AngularFireDatabase, FirebaseObjectObservable } from 'angularfire2/database-deprecated';
import { User } from 'firebase/app';
import { Profile } from './../../model/profile/profile.interface';

export class DataProvider {
	profileObject: FirebaseObjectObservable<Profile>;
	constructor (private database: AngularFireDatabase) {}

	async saveProfile (user: User, profile: Profile) {
		this.profileObject = this.database.object(`/profiles/${user.uid}`);
		try {
			await this.profileObject.set(profile);
			return true;
		} catch (error) {
			return false;

My edit-profile-form is as follows

import { AuthProvider } from '../../providers/auth/auth';
import { DataProvider } from '../../providers/data/data.provider';
import { NavController } from 'ionic-angular';
import { Component } from '@angular/core';
import { Profile } from './../../model/profile/profile.interface';
import { Subscription } from 'rxjs/Subscription';
import { User } from 'firebase';
	selector: 'edit-profile-form',
	templateUrl: 'edit-profile-form.html'
export class EditProfileFormComponent {
	profile = {} as Profile;
	private authenticatedUser$: Subscription;
	private authenticatedUser: User;

	constructor (
		private navCtrl: NavController,
		private auth: AuthProvider,
		private data: DataProvider
	) {
		this.authenticatedUser$ = this.auth.getAuthenticatedUser().subscribe((user: User) => {
			this.authenticatedUser = user;

	async saveProfile () {
		const result = await, this.profile);

	navigateToPage (pageName: string) {
		pageName === 'TabsPage' ? this.navCtrl.setRoot(pageName) : this.navCtrl.push(pageName);

How can i solve the problem?
How can i use updated ‘angularfire2/database’ instead of ‘angularfire2/database-deprecated’?

For what you’re doing, it makes more sense to use Firestore. You would use Firebase valueChanges() if you were keeping track of a chat.

I am a noob, but i have to make an app for my college project.
I’m all around the places, not knowing how to do things properly.
i’m not building a chat app. I’m trying to build an repair service app where people post job offer and technicians and mechanics accept jobs of their area.
i am at my wits end thinking about how to approach the solution.
Can you please give me some advice in this regard?