How to use the aws-amplify.Auth.currentSession function in aws-amplify

ngOnInit() {
    Auth.currentSession().then(session => {
      this.logInfoToConsole(session);
      this.session = session;
      this.register();
      setImmediate(() => this.createUser());
    });

    this.swUpdate.available.subscribe(event => {
      console.log('[App] Update available: current version is', event.current, 'available version is', event.available);
      this.update = true;
    });
  }

getUser = async () => {
    try {
      const session = await Auth.currentSession();
      console.log(session);
    } catch (error) {
      console.log(error);
    }
  };

componentDidMount() {
    Auth.currentSession()
      .then((response) => {
        this.setApplicationUser(response);
      })
      .catch((error) => {
        //console.error(error)
      });
  }

async componentDidMount() {
    try {
      if (await Auth.currentSession()) {
        this.userHasAuthenticated(true);
      }
    }
    catch(e) {
      if (e !== 'No current user') {
        alert(e);
      }
    }
  
    this.setState({ isAuthenticating: false });
  }

custom_header: async () => {
          return { Authorization: (await Auth.currentSession()).idToken.jwtToken };
        }
      }

    jwtToken: async () => (await Auth.currentSession()).getAccessToken().getJwtToken(),
  },

    jwtToken: async () => (await Auth.currentSession()).getIdToken().getJwtToken(),
  },