Add graphql support

[Revadike]

Functionality, like redeeming product codes, rely on graphql queries and mutations. It would be nice to see some kind of abstraction for graphql requests. I could PM you some examples.

[SzymonLisowiec]

I don't have free time to add it, but you can use below code:

const { GraphQLClient } = require('graphql-request');

// client - instance of epicgames-client

const ql = new GraphQLClient('https://graphql.epicgames.com/graphql', {
  headers: {
    Authorization: `${client.account.auth.tokenType} ${client.account.auth.accessToken}`,
    Origin: 'https://epicgames.com',
    Cookie: `EPIC_BEARER_TOKEN=${client.account.auth.accessToken}`,
    Referer: 'https://www.epicgames.com,
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36',
    'X-Requested-With': 'XMLHttpRequest',
    'X-XSRF-TOKEN': 'XSRF TOKEN FROM EG. HOMEPAGE EPICGAMES.COM',
  },
});

I used it a long time ago, so something may need improvement