Auth0 notify backend on social auth "registration"

auth0-rule.js

async function (user, context, callback) {
  const axios = require('axios');

  const isSocial = context.connectionStrategy === context.connection;
  // if it is the first login (hence the `signup`) and it is a social login
  if (context.stats.loginsCount === 1 && isSocial) {
    
    let loginMethod = '';
  	const connectionName = user.identities[0].provider.toLowerCase();

    if (connectionName.includes('google')) {
      loginMethod = 'Google';
    } else if (connectionName.includes('apple')) {
      loginMethod = 'Apple';
    } else if (connectionName.includes('facebook')) {
      loginMethod = 'Facebook';
    }
    
    return axios.post('https://your.api', {
     email: user.email,
     userId: user.identities[0].user_id,
     provider: 'Auth0',
     loginMethod,
     socialProviderId: user.identities[0].user_id,
    },
  {
    headers: {
      ...
    }
  }).catch(console.error)
    .finally(() => {
       // always let the user login, no matter if an error happens
       return callback(null, user, context);
    });
  } else {
   return callback(null, user, context);
  }
}