Cannot implicitly convert type `string' to `UnityEngine.Object' and Firebase

I am getting an error on the code in this tutorial

https://firebase.google.com/docs/database/unity/save-data

Below is the code section I am having trouble with. I am getting the error on two lines, 26 and 27.

 result["uid"] = uid: this gives me the "Cannot implicitly convert type `string' to `UnityEngine.Object'
 result["score"] = score: this gives me the "Cannot implicitly convert type `int' to `UnityEngine.Object'

 public class FirebaseController : MonoBehaviour {
  
     [System.Serializable]
     public class LeaderBoardEntry : System.Object {
     public string uid;
     public int score = 0;
  
     public LeaderBoardEntry() {
     }
  
     public LeaderBoardEntry(string uid, int score) {
         this.uid = uid;
         this.score = score;
     }
  
     public Dictionary<string, Object> ToDictionary() {
         Dictionary<string, Object> result = new Dictionary<string, Object>();
         result["uid"] = uid; //Line:26
         result["score"] = score; //Line:27
  
         return result;
     }
     }
  
     DatabaseReference mDatabaseRef;
  
     // Use this for initialization
     void Start () {
         // Set up the Editor before calling into the realtime database.
     FirebaseApp.DefaultInstance.SetEditorDatabaseUrl("https://downhillslalom-8c3e6.firebaseio.com/");
  
     // Get the root reference location of the database.
     mDatabaseRef = FirebaseDatabase.DefaultInstance.RootReference;
     }
  
     public void setHighscoreData(int Hscore) {
         string uid = PlayerPrefs.GetString("userName");
         int score = Hscore;
  
         string key = mDatabaseRef.Child("Scores").Push().Key;
  
         LeaderBoardEntry entry = new LeaderBoardEntry(uid, score);
         Dictionary<string, Object> entryValues = entry.ToDictionary();
  
         Dictionary<string, Object> childUpdates = new Dictionary<string, Object>();
         childUpdates["/Scores/" + key] = entryValues;
  
         mDatabaseRef.UpdateChildrenAsync(childUpdates);
  
  
     }
 }

Please help. Thanks