user has no permission for clips:write after paying membership to Build.

I've paid the membership to the Build API plan. When I use the API Key to create a /clip I get:

 {
  kind: 'PermissionError',
  description: 'user has no permission for clips:write'
}

Do I need to wait for the membership to become active?

Or do I need to upgrade to Launch Plan to use this endpoint?

If so, please update the documentation to make this extremely clear for first time users.