database.rules.json

{
  "rules": {
    ".read": false,
    ".write": false,
    "users": {
      "$userId": {
        ".read": "$userId === auth.uid",
        ".write": "$userId === auth.uid",
        "screenshots": {
          ".indexOn": [
            "parentId",
            "trash"
          ],
          ".read": "$userId === auth.uid",
          ".write": "$userId === auth.uid"
        },
        "videos": {
          ".indexOn": [
            "parentId",
            "trash"
          ],
          ".read": "$userId === auth.uid",
          ".write": "$userId === auth.uid"
        },
        "profile": {
          ".read": true,
          ".write": "$userId === auth.uid"
        }
      }
    },
    "shared": {
      ".indexOn": [
        "uidImageId",
        "uid"
      ],
      ".read": "auth != null",
      ".write": "auth != null"
    },
    "sharedVideos": {
      ".indexOn": [
        "uidVideoId",
        "uid"
      ],
      ".read": "auth != null",
      ".write": "auth != null"
    },
    "sharedWorkspaceItems": {
      ".indexOn": "queryField",
      ".read": "auth != null",
      ".write": "auth != null"
    }
  }
}