Improvement
APIAPI keys and webhooks return the full object
Creating, listing and updating an API key return the same fields, and updating a webhook returns the whole webhook.
Every API key endpoint now returns the same object: id, name,
key_preview, user_id, scopes, spending_limit, spending_limit_period,
created_at and updated_at. An unset name or spending_limit is null.
Creating a key used to leave both out, and only creating one returned user_id.
PUT /webhooks/{id} now returns the whole webhook, including user_id,
created_at and updated_at, like POST /webhooks does. The signing
secret is still returned only when the webhook is created.