Let me explain the situation (excuse my english, I will do my best):

I have two Firebase Web projects in my Firebase console: coretechtest-ce207 and agon-plugin

coretechtest-ce207 is the main app and agon-plugin is a secondary app wich needs to connect to the auth and database of coretechtest-ce207. As far as I know I can't host two apps on the same project so thats why I made to separated projects. The main one works fine, I can do everything I want (signup, database, etc.) but I need the main and the second one both on the same auth and DB. agon-plugin (secondary one) is made based on the FriendlyChat app and connects directly to the server in wich the app is hosted.
For example:

```
// Initializes FriendlyChat.
function FriendlyChat() {
    this.initFirebase();

}

// Sets up shortcuts to Firebase features and initiate firebase auth.
FriendlyChat.prototype.initFirebase = async function() {
    // Shortcuts to Firebase SDK features.
    this.auth = firebase.auth();
    this.database = firebase.database();
    this.storage = firebase.storage();
    // Initiates Firebase auth and listen to auth state changes.
    await this.auth.onAuthStateChanged(this.onAuthStateChanged.bind(this));   
};

```

As you can see there is no need to put 

```
apiKey: "AIzaSyAfGm_ILVdfsd--Fw7aascc8tAB73q__Bbko",
authDomain: "coretechtest-ce207.firebaseapp.com",
databaseURL: "https://coretechtest-ce207.firebaseio.com",
projectId: "coretechtest-ce207",
storageBucket: "coretechtest-ce207.appspot.com",
messagingSenderId: "994718782"

```

I tryied replacing it using those parameters so it would be 

```
    FriendlyChat.prototype.initFirebase = async function() {
// Shortcuts to Firebase SDK features.

    this.auth = 'coretechtest-ce207.firebaseapp.com';
    this.database = 'https://coretechtest-ce207.firebaseio.com';
    this.storage = 'coretechtest-ce207.appspot.com';

// Initiates Firebase auth and listen to auth state changes.
   await this.auth.onAuthStateChanged(this.onAuthStateChanged.bind(this));   
};

```

But no luck there, can you tell me what I am doing wrong? I thought that replacing that would connect to my main project but it did not... =/
I hope you can understand what Im trying to say!

Thanks!