Get user data from Firebase

getUserData.js

const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp(functions.config().firebase);

// On sign up.
exports.processSignUp = functions.auth.user().onCreate(user => {
  const customClaims = {
    "https://hasura.io/jwt/claims": {
      "x-hasura-default-role": "user",
      "x-hasura-allowed-roles": ["user"],
      "x-hasura-user-id": user.uid
    }
  };

  return admin
    .auth()
    .setCustomUserClaims(user.uid, customClaims)
    .then(() => {
      // Update real-time database to notify client to force refresh.
      const metadataRef = admin.database().ref("metadata/" + user.uid);
      // Set the refresh time to the current UTC timestamp.
      // This will be captured on the client to force a token refresh.
      return metadataRef.set({ refreshTime: new Date().getTime() });
    })
    .catch(error => {
      console.log(error);
    });
});