Gatsby custom field resolver

gatsby-config.js

// Importing this fails, as the plugin is distributed in modern module format
// and `gatsby-config.js` is not transpiled.
const firebase = require('gatsby-plugin-firebase')

exports.createResolvers = ({ createResolvers }) => {
  const resolvers = {
    Query: {
      customField: {
        type: 'String',
        resolve() {
          firebase.database().and.so.on()
        }
      }
    }
  }
  createResolvers(resolvers)
}