POST /messaging/v1/domainverification/register

Registers a domain for validation by generating and returning the token added to the DNS.

Name	Type		Description
domain	string	Required	The root domain of the email address.

Status	Name	Type	Description
200			OK. Key is created.
	domain	string	The root domain of the email address.
	token	string	The token added to the DNS.
			{ "key": "string"}

403			Insufficient privileges
	message	string	Invalid domain
	errorcode	string	Error code for exception
	description	string	https://developer.salesforce.com/docs/atlas.en-us.mc-apis.meta/mc-apis/error-handling.htm