Feature: Add Domain to API

[nyagamunene]

Is your feature request related to a problem? Please describe.

When using PAT this is the best approach to get Domain ID for authorization. Also this approach will be the most efficient for adding domains to events.

Describe the feature you are requesting, as well as the possible use case(s) for it.

For example, when sharing a thing: http://localhost:9000/domains{{DOMAINID}}/things/{{THINGID}}/share

Indicate the importance of this feature to you.

Must-have

Anything else?

No response