title: How do I update an object in Firebase specific property?
body: <p>I am trying to update a User in Firebase using Angular 4 with AngularFire2. In the user object that tis saved to the firebase database, I want to insert another object into an array property. In my service I am trying to do this functionality (I already have everything in keys etc also)</p>
  
  <pre><code>generateUserCharacterList(){
    this.genCharList = new CharacterList(x, y, z)
    this.UserListOfCharacters.push(this.genCharList)
    //Other code...
  }
  </code></pre>
  
  <p>This does not work though</p>