title: error TS2339: Property 'email' does not exist on type 'Object'
body: <p>I'm using angular 5 and i got an error, heres the code :</p>
  
  <pre><code>signIn(provider) {
      this._auth.login(provider).subscribe(
        (data) =&gt; {
          console.log(data);
          this.hideForm = false;
  
          this.emaill = data.email;
          this.nom = data.last_name;
          this.prenom = data.first_name;
          this.profileImage = data.image;
      })
  }
  </code></pre>
  
  <p>The error is :</p>
  
  <blockquote>
    <p>src/app/authentification/authentification.component.ts(34,28): error TS2339: Property 'email' does not exist on type 'Object'.
    src/app/authentification/authentification.component.ts(35,25): error TS2339: Property 'last_name' does not exist on type 'Object'.
    src/app/authentification/authentification.component.ts(36,28): error TS2339: Property 'first_name' does not exist on type 'Object'.
    src/app/authentification/authentification.component.ts(37,34): error TS2339: Property 'image' does not exist on type 'Object'.</p>
  </blockquote>