Better error messaging around `Error: maintenance in subscription xxx not found`

[jestallin]

  │ Error: maintenance in subscription xxx not found
  │ 
  │   with data.rediscloud_subscription.source,
  │   on dependencies.tf line 2, in data "rediscloud_subscription" "source":
  │    2: data "rediscloud_subscription" "source" {

We confirmed with our Redis rep that when we encounter this error that it has been explained a limitation of trying to perform multiple operations on Redis databases at the same time in our subscription. The existing error message is confusing to developers who have not seen the error message before.

Is it possible to improve the error message for this scenario? Maybe use the 429 response code from the REST api
https://redis.io/docs/latest/operate/rc/api/api-reference/#tag/Databases-Pro/operation/createDatabase