App.js

import React from "react";
import { ApolloProvider } from "react-apollo";
import { ApolloClient, HttpLink, InMemoryCache } from "apollo-boost";
import { setContext } from "apollo-link-context";
import Navigator from "./Navigator";
import { getToken } from "./loginUtils";

const authLink = setContext(async (req, { headers }) => {
  const token = await getToken();
  return {
    ...headers,
    headers: {
      authorization: token ? `Bearer ${token}` : null
    }
  };
});

const httpLink = new HttpLink({
  uri: "https://api.graph.cool/simple/v1/cjgr93mby1k870162a3c36e56"
});

const link = authLink.concat(httpLink);

const client = new ApolloClient({
  link,
  cache: new InMemoryCache()
});

export default class App extends React.Component {
  render() {
    return (
      <ApolloProvider client={client}>
        <Navigator />
      </ApolloProvider>
    );
  }
}