fix: builder and sdk changes (#81)

## Description

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At least please give us some description what you are trying to achieve and why your change is needed. -->

relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Co-authored-by: marcel.henselin <marcel.henselin@stackit.cloud>
Reviewed-on: #81

docs/data-sources/sqlserverflexalpha_user.md

@@ -0,0 +1,62 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "stackitprivatepreview_sqlserverflexalpha_user Data Source - stackitprivatepreview"
+subcategory: ""
+description: |-
+  
+---
+
+# stackitprivatepreview_sqlserverflexalpha_user (Data Source)
+
+
+
+## Example Usage
+
+```terraform
+data "stackitprivatepreview_sqlserverflexalpha_user" "example" {
+  project_id  = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+  instance_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+  user_id     = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `instance_id` (String) The ID of the instance.
+- `project_id` (String) The STACKIT project ID.
+- `region` (String) The region which should be addressed
+
+### Optional
+
+- `page` (Number) Number of the page of items list to be returned.
+- `size` (Number) Number of items to be returned on each page.
+- `sort` (String) Sorting of the users to be returned on each page.
+
+### Read-Only
+
+- `pagination` (Attributes) (see [below for nested schema](#nestedatt--pagination))
+- `users` (Attributes List) List of all users inside an instance (see [below for nested schema](#nestedatt--users))
+
+<a id="nestedatt--pagination"></a>
+### Nested Schema for `pagination`
+
+Read-Only:
+
+- `page` (Number)
+- `size` (Number)
+- `sort` (String)
+- `total_pages` (Number)
+- `total_rows` (Number)
+
+
+<a id="nestedatt--users"></a>
+### Nested Schema for `users`
+
+Read-Only:
+
+- `status` (String) The current status of the user.
+- `tf_original_api_id` (Number) The ID of the user.
+- `username` (String) The name of the user.