Resource coderd_user: Plan fails when user was deleted outside of terraform

[michvllni]

When a user created via the coderd provider is removed outside of terraform, the plan fails because it cannot find the user.

resource "coderd_user" "user" {
  username = "myuser"
  email = "myuser@myorg.com"
  name = "My User"
  roles = []
  login_type = "oidc"
}

╷
│ Error: Client Error
│ 
│   with coderd_user.user,
│   on users.tf line 1, in resource "coderd_user" "user":
│    1: resource "coderd_user" "user" {
│ 
│ Unable to get current user, got error: GET
│ https://<REDACTED url>/api/v2/users/<REDACTED user id>:
│ unexpected status code 400: "user" must be an existing uuid or username.
│ 	Error: queried user="<REDACTED user id>"
╵

I would have expected the provider to mark this as deleted instead of running into an error