I do it the following way,
Step 1 - Use make.com to integrate calendly with airtable
Step 2 - Connect airtable with airscale.io, or clay/apollo.io enricher to scrape the details.
Step 3 - Find additional information about the company/people using apify/texau website scraper. I do it manually. (If needed)
Step 4 - Use Open AI Platform/Airtable AI to generate meeting prep notes based on input from descriptions. (If needed)
You can connect airtable directly with slack.
It won't get your account banned, if you are concerned about getting it banned, use a different LinkedIn account or a fake one. It's for a temporary use case and we've been doing this for months without any issues.
Step 1 - Get an aged LinkedIn Account
Step 2 - Add yourself as an employee of the company and wait upto 24 hrs
Step 3 - Get Sales Navigator, and add the filter 'follows your page'
Step 4 - get airscale.io, and scrape the followers (it's free)