По промежуточного слоя Apollo Link не добавляются пользовательские заголовки к запросам

// 1 HttpLink that will connect your ApolloClient instance with the GraphQL API (If you have multiple URL's)
const httpLink = split(
  operation => operation.getContext().type === 'public',
  new HttpLink({ uri: `${GraphQLURLPublic}/query` }),
  new HttpLink({ uri: `${GraphQLURLPrivate}/query` }),
);

// 2 Added Middleware to Insert Authorization Header If Required
// Split URL to two different endpoints If the type is Private it will Token in header else it won't
const authLink = setContext((operation, previousContext) => {
  const { headers, type } = previousContext;
  if (type === 'public') {
    return previousContext;
  }

  //You access token to make call
  const accessToken = 'xtz'
  if (accessToken) {
    return {
      ...previousContext,
      headers: {
        ...headers,
        authorization: accessToken
      },
    };
  }

  return { ...previousContext };
});


// 3 Added error handling
const ErrorLink = onError(({ graphQLErrors, networkError }) => {
  if (graphQLErrors)
    graphQLErrors.map(({ message, locations, path }) =>
      console.info(
        `[GraphQL error]: Message: ${message}, Location: ${locations}, Path: ${path}`,
      ),
    );

  if (networkError) console.info(`[Network error]: ${networkError}`);
});

// 4 concat all links, NOTE: httpLink must be last
const link = ApolloLink.from([authLink, ErrorLink, httpLink]);

// 5 Instantiate ApolloClient by passing in the composed link and a new instance of an InMemoryCache.
const graphqlConfig = new ApolloClient({ link, cache: new InMemoryCache(), queryDeduplication: false });