Azure: delete users in a group

#!/bin/bash

GROUP_NAME=$1

# Get user group id
GROUP_ID=$(az ad group list --query "[?displayName=='$GROUP_NAME'].objectId" --output tsv)
USERS_ID=$(az ad user list --query "[?contains(userPrincipalName,'$GROUP_NAME')].objectId" --output tsv)
IFS=' '
# Add new users to users group
echo $USERS_ID | while read USER; do az ad user delete --id $USER; done