I currently have an interface defined for making calls, I was wondering how do I attach the browser cookies to each request? I tried document.cookie but I am getting an error

    this.server = `${process.env.RESTRICTED_SERVER}`;
    this.ApiVer = '/rest/v3';
    this.api = new OpenAPIClientAxios({
      definition: 'rant_openapi_spec.json',
      axiosConfigDefaults: {
        baseURL: process.env.RESTRICTED_SERVER + '/rest/v3',
        auth: {
          username: process.env.ADMIN_USERNAME,
          password: process.env.ADMIN_PASSWORD
        },
        headers: {
          'content-type': 'application/json',
          'cookie': document.cookie

        }
      },
    });
    this.api.init();