How to inject one service in to other?

Ionic Framework ionic-v3
1

I have two services/providers: APIRequest and Auth. I need to have instance of each one inside the other.

NgModule looks like this:

// Providers
import { Auth } from '../providers/auth';
import { APIRequest } from '../providers/api-request';

@NgModule({
    providers: [
        Auth, APIRequest, Storage,
        {
            provide: ErrorHandler,
            useClass: IonicErrorHandler
        }
    ]
})

Auth.ts like this

import { Injectable } from '@angular/core';

import { Http } from '@angular/http';
import { Events } from 'ionic-angular';

import { Storage } from '@ionic/storage';

import { APIRequest } from './api-request'

@Injectable()

export class Auth {

    constructor(
        private events: Events,
        private storage: Storage,
        private http: Http,
        private apiRequest: APIRequest
    ) {}

APIRequest.ts like this:

import { Injectable } from '@angular/core';

import { Http, XHRBackend, RequestOptions, Request, RequestOptionsArgs, Response, Headers } from '@angular/http';

import { Events } from 'ionic-angular';

import { Storage } from '@ionic/storage';

import { Auth } from './auth';

@Injectable()

export class APIRequest extends Http {

    constructor (
        backend: XHRBackend, 
        options: RequestOptions, 
        private storage: Storage,
        private events: Events,
        private auth: Auth
    ) {
        super(backend, options)
    }

The error I get: Uncaught Error: Can’t resolve all parameters for Auth: (Events, Storage, Http, ?).

2

Look into forwardRef.

3

Can you provide an example?