curl --request GET \
  --url {schemes}://api.upsun.com/users/{user_id}/project-access/{project_id} \
  --header 'Authorization: Bearer <token>'

{
  "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "organization_id": "<string>",
  "project_id": "<string>",
  "project_title": "<string>",
  "permissions": [
    "admin"
  ],
  "granted_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "_links": {
    "self": {
      "href": "<string>"
    },
    "update": {
      "href": "<string>",
      "method": "<string>"
    },
    "delete": {
      "href": "<string>",
      "method": "<string>"
    }
  }
}