ISSUE: Protect domains REST API

[f-trivino]

Domains rest API does not require any authentication but it should be protected and restricted to the django admin user.

[antoniotorresm]

Connections are secured by using HTTPS. The 'scim' django app is protected by using the scim user defined in

ipa-tuura/src/ipa-tuura/root/settings.py

Line 139 in ab37d36

SCIM_SERVICE_PROVIDER = {

However, the rest of the apps are not protected, so we should prepare users similar to this one.