| Key | Value | Examples | 
|---|---|---|
| subaccount | Any unique identifier of up to 255 characters (regardless of character encoding); Massive will bill requests made from subaccounts separately | user@mail.com, user1 | 
If you prefer to segregate requests for your customer invoicing or internal accounting, subaccounts can be provided.
| Key | Value | Examples | 
|---|---|---|
| subaccount | Any unique identifier of up to 255 characters (regardless of character encoding); Massive will bill requests made from subaccounts separately | user@mail.com, user1 |