fetch url options const headers Accept application json Content-Type a

    fetch = (url, options) => {
        const headers = {
            'Accept': 'application/json',
            'Content-Type': 'application/json'
        }

        if (this.authorized()) {
            headers['Authorization'] = 'Bearer ' + this.getToken()
        }

        return fetch(url, {
            headers,
            ...options
        });
    }

    fetchJson = async (url, options) => {
        let response = await this.fetch(url, options);
        let json = await response.json();
        return json;
    }