onSubmit() {
      this.loading = true;

      const body = () => ({
        username: this.username,
        password: this.password,
      });

      const processResponse = (response) => {
        this.loading = false;

        if (response.data.success) {
          this.loggedUser = response.data.username;
        } else {
          this.error = 'Incorrect username/password';
        }
      };

      const error = e => console.log(e);

      axios
        .post(`${API}/api/login`, body())
        .then(processResponse)
        .catch(error);
    }