Login to Cloudflare.com

Manage Account -> Members

Type in the email address to invite

Include -> All domains (or the specific domains to share)

Cloudflare New Jersey hosting

Cloudflare NJ Website Hosting

 

Select these 2 Checkboxes

DNS (can edit DNS records)

SSL/TLS, Caching, Performance, Page Rules, and Customization

Cloudflare SEO in New Jersey

Click Continue to summary

Then click Invite