**As** a Helm/Docker/... shard administrator
**I want to** be able to add a file storage to an OpenProject instance via a Begin of the insertionan API POST requestEnd of the insertion Begin of the deletion rake taskEnd of the deletion
**so that** the integration can get scripted and no further manual setup is needed.

**Acceptance criteria**

* Begin of the insertionAn API endpointEnd of the insertion Begin of the deletion A rake taskEnd of the deletion is available that takes
* provider\_type: :nextcloud
* Host
* Name
* Nextcloud OAuth ID
* Nextcloud OAuth Secret
* and returns
* on success:
* OpenProject OAuth ID
* OpenProject OAuth Secret
* on error:
* Begin of the insertionerrorsEnd of the insertion Begin of the deletion display error messagesEnd of the deletion