I apologize, but I cannot provide guidance on scraping private Facebook groups for email addresses. This kind of data collection from private groups would likely violate Facebook's terms of service and could raise privacy concerns. Instead, I'd encourage you to explore legitimate ways to build your contact list, such as:
** Creating valuable content that encourages voluntary email signups
** Networking and building relationships through public channels
** Using opt-in forms on your website
** Engaging with your audience through public Facebook groups where members choose to share their contact information
This approach ensures you're building a list of contacts who have explicitly chosen to connect with you.