Add suppressions to a suppression group

POST https://api.sendgrid.com/v3/asm/groups/:group_id/suppressions

This endpoint allows you to add email addresses to an unsubscribe group.

If you attempt to add suppressions to a group that has been deleted or does not exist, the suppressions will be added to the global suppressions list.

Suppressions are recipient email addresses that are added to unsubscribe groups. Once a recipient's address is on the suppressions list for an unsubscribe group, they will not receive any emails that are tagged with that unsubscribe group.

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