User ID / Login User

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  window.dataLayer = window.dataLayer || [];
  window.dataLayer.push({
    'event': 'userID',
    'login_status': 'logged in',
    'userID': '45ffg346sdfg78'
  });
</script>

.......... * ..........

<script>
  window.dataLayer = window.dataLayer || [];
  window.dataLayer.push({
    'event': 'login',
    'clientType': 'VIP',
    'registrationCountry': 'Bangladesh'
  });
</script>