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  componentDidMount() {
    window.gapi.load("client:auth2", () => {
      window.gapi.client
        .init({
          clientId:
            "483861721218-7r8umssap2m7vv8gbe6bfs0m52ghb9cp.apps.googleusercontent.com",
          scope: "email"
        })
        .then(() => {
          this.auth = window.gapi.auth2.getAuthInstance();
          this.onAuthChange(this.auth.isSignedIn.get());
          this.auth.isSignedIn.listen(this.onAuthChange);
        });
    });
  }