Add a secret to a client

curl --request POST \
  --url http://localhost:55001/api/auth/clients/{clientId}/secrets \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "metadata": {}
}'

{
  "data": {
    "name": "<string>",
    "metadata": {},
    "id": "<string>",
    "lastDigits": "<string>",
    "clear": "<string>"
  }
}