curl --request PATCH \
  --url https://api.gcore.com/cloud/v1/faas/keys/{project_id}/{region_id}/{key_name} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "functions": [
    {
      "name": "<string>",
      "namespace": "<string>"
    }
  ],
  "description": "key-description",
  "expire": "2023-08-22T11:21:00Z"
}
'

{
  "created_at": "<string>",
  "functions": [
    {
      "name": "<string>",
      "namespace": "<string>"
    }
  ],
  "name": "<string>",
  "status": "<string>",
  "description": "key-description",
  "expire": "2023-08-22T11:21:00Z"
}