Onboard object storage credentials group (#74)

* Onboard credentials group resource

* Update object storage acc test

* Fix typo

* Generate docs, add examples, fix typos

* Refactor map fiels

* Add unit test for readCredentialsGroups

* Fix lint issues§
g

* Use projectId from Model

* Fix errors§
g

* Fix test

* Simplify signature of enableProject

* Change comment

* Add TestEnableProject

* Rename variable

* Add enableProject test

* Remove unused test setting

* Fix wrong error message

* Improve test case, rename mocked data

* Fix typo

* Removed unnecessary test case

* Removed unnecessary test case

---------

Co-authored-by: Henrique Santos <henrique.santos@freiheit.com>

docs/data-sources/objectstorage_bucket.md

@@ -3,12 +3,12 @@
 page_title: "stackit_objectstorage_bucket Data Source - stackit"
 subcategory: ""
 description: |-
-  ObjectStorage credential data source schema.
+  ObjectStorage bucket data source schema.
 ---
 
 # stackit_objectstorage_bucket (Data Source)
 
-ObjectStorage credential data source schema.
+ObjectStorage bucket data source schema.
 
 
 

docs/data-sources/objectstorage_credentials_group.md

@@ -0,0 +1,30 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "stackit_objectstorage_credentials_group Data Source - stackit"
+subcategory: ""
+description: |-
+  ObjectStorage credentials group data source schema.
+---
+
+# stackit_objectstorage_credentials_group (Data Source)
+
+ObjectStorage credentials group data source schema.
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `project_id` (String) Object Storage Project ID to which the credentials group is associated.
+
+### Optional
+
+- `credentials_group_id` (String) Terraform's internal data source identifier. It is structured as "`project_id`,`credentials_group_id`".
+- `name` (String) The credentials group's display name.
+
+### Read-Only
+
+- `id` (String) Terraform's internal data source identifier. It is structured as "`project_id`,`credentials_group_id`".
+- `urn` (String) Credentials group uniform resource name (URN)

docs/resources/objectstorage_credentials_group.md

@@ -0,0 +1,27 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "stackit_objectstorage_credentials_group Resource - stackit"
+subcategory: ""
+description: |-
+  ObjectStorage credentials group resource schema.
+---
+
+# stackit_objectstorage_credentials_group (Resource)
+
+ObjectStorage credentials group resource schema.
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `name` (String) The credentials group's display name.
+- `project_id` (String) Project ID to which the credentials group is associated.
+
+### Read-Only
+
+- `credentials_group_id` (String) The credentials group ID
+- `id` (String) Terraform's internal data source identifier. It is structured as "`project_id`,`credentials_group_id`".
+- `urn` (String) Credentials group uniform resource name (URN)