Counter Management

Action	Method	Endpoint
Create terminal	`POST`	`/merchant/api/v1/counters`
List terminals	`GET`	`/merchant/api/v1/counters`
Get terminal	`GET`	`/merchant/api/v1/counters/{id}`
Update terminal	`PUT`	`/merchant/api/v1/counters/{id}`
Deactivate terminal	`DELETE`	`/merchant/api/v1/counters/{id}`
Rotate webhook secret	`POST`	`/merchant/api/v1/counters/{id}/rotate-secret`

Rotate the webhook secret if it is ever exposed or compromised. All subsequent webhooks will use the new secret immediately.