A Client is an account and is created for every Organization that uses CakeMail's services.
An Admin User is created at the same time as the Client. Each Client (Account) may have as many Users as required. The Admin controls the permissions of each user within the Client account. Also, a Contact User may be created at the same time as the Admin User, upon creation of the Client Account. The Contact user is a secondary User. If no Contact User is entered, the Admin User is set as the default Contact User.
Each Client has a Client ID. When creating a Child Client, use the Master Client ID as the "parent_id" upon creation of the new Client Account. The new Client Account will then be recognized as a Child Account of the Master.