[Sharing-NG] can't get sharing permission for a resource

[nirajacharya2]

Describe the bug

I can not get permission of a particular share using both root and permissions endpoint. which should be possible according to the api specifications on:
https://owncloud.dev/libre-graph-api/#/drives.permissions/GetPermission
https://owncloud.dev/libre-graph-api/#/drives.root/GetPermissionSpaceRoot

Steps to reproduce

1. create a link share of a resource

curl -k -XPOST https://localhost:9200/graph/v1beta1/drives/{drive-id}/items/{item-id}/createLink -uadmin:admin

2. get sharing permission for that resource

curl -k -XGET https://localhost:9200/graph/v1beta1/drives/{drive-id}/items/{item-id}/permissions/{permission-id} -uadmin:admin

Expected behavior

The request should given the permission of the share

Actual behavior

The request gives 405 status code

< HTTP/1.1 405 Method Not Allowed
< Allow: PATCH
< Allow: DELETE

Setup

Please describe how you started the server and provide a list of relevant environment variables or configuration files.

ownCloud Web UI 9.1.0-alpha.1
 Infinite Scale 6.0.0+aa6041abb6 Community

Additional context

Add any other context about the problem here.

[saw-jan]

endpoints are listed but not working: (405 Method Not Allowed)

https://owncloud.dev/libre-graph-api/#/drives.permissions/GetPermission
https://owncloud.dev/libre-graph-api/#/drives.root/GetPermissionSpaceRoot

CC @micbar @rhafer

[2403905]

The endpoint is not implemented.
We can retrieve the item permission via https://owncloud.dev/libre-graph-api/#/drives.permissions/ListPermissions