Supressões
The suppression list: numbers and BSUIDs that never receive a marketing campaign, whatever their consent.
List suppressions
An API key limited to some numbers gets `403`: the suppression list belongs to the whole account.
Add to the suppression list
Adds a phone or BSUID with the `manual` reason. If the identity is already listed,
Remove from the suppression list
Removes the identity from the list. Rows with reason `opt_out` or