Stop Gmail/Ms account with a certain domain from registering or logging in

[dan.woda]

Yes, you can use it directly in an Action.

How can I use the Management API in Actions?

Question: How can I use the Management API in Actions? Answer: There are plans to expand functionality in Actions even more in the future. Currently, the only built-in method for using the Management API from within Actions is for updating user metadata. You can use the api object to update user metadata in a pre-user-registration or post-login action: api.user.setUserMetadata(name, value) api.user.setAppMetadata(name, value) If you need to use the Management API for something other than upda…