1. Create a script that create a new user on [login to view URL]
2. Make a script that can set the DNS from a text file or from the command line.
Something like a text file like:
bla (at) [login to view URL]:
a somesite [login to view URL]
cname www [login to view URL]
a [login to view URL] [login to view URL]
will create a new account on cloudflare with the email bla(at)[login to view URL], with somesite pointing to [login to view URL] and [login to view URL] pointing to 10.10.10.20.