Common Error Responses

Status Code	Message	Description
400 Bad Request	"Invalid domain format"	The provided domain is not formatted correctly.
`401 Unauthorized`	`"Invalid Api-Key"`	The API key provided is invalid or missing.
404 Not Found	"Domain not found"	The domain to follow/unfollow does not exist in the system.
`500 Internal Server Error`	`"Unexpected error occurred"`	A server error occurred while processing the request.

Notes:

Ensure the API key has the necessary permissions to access these endpoints.
Domains can only be subscribed or unsubscribed by users who are authorized within the organization associated with the provided API key.