Database User Auth Reset support for All DB Engines

[rpmoore]

Updating reset user auth for databases to work for multiple database types including mongo

[andrewsomething]

Looks like wee need to update the API docs:

Note: Resetting user authentication is not supported for PostgreSQL and Redis clusters.

https://docs.digitalocean.com/reference/api/api-reference/#operation/reset_auth

[rpmoore]

Looks like wee need to update the API docs:

Note: Resetting user authentication is not supported for PostgreSQL and Redis clusters.

https://docs.digitalocean.com/reference/api/api-reference/#operation/reset_auth

That is correct. Where is the best place to do that?

[scotchneat]

@rpmoore I pushed a PR for the docs changes - digitalocean/openapi#527

[andrewsomething]

👍 LGTM!