generate access token for hasura code example

Example: auth0 sync with hasura postgress database

function (user, context, callback) {
  const userId = user.user_id;
  const hasuraAdminSecret = "xxxx";
  const url = "https://my-hasura-app.hasura.app/v1/graphql";
  const upsertUserQuery = `
    mutation($userId: String!){
      insert_users(objects: [{ id: $userId }], on_conflict: { constraint: users_pkey, update_columns: [] }) {
        affected_rows
      }
    }`
  const graphqlReq = { "query": upsertUserQuery, "variables": { "userId": userId } }

  request.post({
      headers: {'content-type' : 'application/json', 'x-hasura-admin-secret': hasuraAdminSecret},
      url:   url,
      body:  JSON.stringify(graphqlReq)
  }, function(error, response, body){
       console.log(body);
       callback(null, user, context);
  });
}