post https://api.getmati.com/govchecks/v1/ng/nin/
Verify a user's National Identity Number
MetaMap takes a user's National Identity Number (NIN) or phone number to verify their identity through the National Identity Management Commission (NIMC).
The request body can also include metadata so you can use your own internal references to identify your users and requests. metadata should be sent for every Webhook. The metadata parameter should have a maximum size of ≦4Kb and be only one level deep.