# Using values from async function

**URL:** <https://forum.heroiclabs.com/t/using-values-from-async-function/2603>\
**Category:** Game Design\
**Tags:** sdk-unity\
**Created:** [May 4, 2022, 3:16pm UTC](https://forum.heroiclabs.com/t/using-values-from-async-function/2603 "2022-05-04T15:16:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![solidsnakeit](https://avatars.discourse-cdn.com/v4/letter/s/e19b73/32.png) [@solidsnakeit](https://forum.heroiclabs.com/u/solidsnakeit)\
**Post date:** [May 4, 2022, 3:16pm UTC](https://forum.heroiclabs.com/t/using-values-from-async-function/2603/1 "2022-05-04T15:16:00Z")

</div>

Hello,

I’m a little confused.  
the problem is me and my lack of knowledge.  
For this I ask for your help even if I realize that it is a little off-topic.

**Problem**  
I have the ability to retrieve the group list (ListGroupsAsync function).  
This list is called in the “OnStart ()” event of my gameManager.  
Until here everything seems easy.

I would like to retrieve the list of groups and store them in my own list.  
_Unfortunately, the list of groups that returns correctly is not accessible outside the task._

What am I doing wrong? Can you help me?

here my code:

```auto
public class GameManager : MonoBehaviour
{   
    private NakamaConnection nakamaConnection;
    private GameController gameController;

    private void Awake()
    {
        gameController = GameController.instance;
        nakamaConnection = gameController.nakamaConnection;
   }

    // Start is called before the first frame update
    void Start()
    {
        IApiGroupList groups = ListGroups();

        foreach (var group in groups.Groups). <-- GROUPS IS ALWAYS NULL
        {
            Debug.Log(group.Name);
        }
        Debug.Log("GameManager - ListGroup | Gruppi letti correttamente");

    }

    IApiGroupList ListGroups()
    {
        var task = nakamaConnection.Client.ListGroupsAsync(GameController.instance.nakamaConnection.Session, "Piq400%", 100);

        IApiGroupList result = null;

        var groups = task.ContinueWith(t =>
        {
            foreach (var group in t.Result.Groups)
            {
                Debug.Log(group.Name);
            }
            result = t.Result;
        }, TaskContinuationOptions.OnlyOnRanToCompletion);

        task.ContinueWith(t =>
        {
            Debug.Log("GameManager - ListGroup | Error reading groups " + t.Exception);
        }, TaskContinuationOptions.NotOnRanToCompletion);

        return result;
    }
}

```

---

<div class="post-metadata">

**Author:** ![Confuzzleinator](https://avatars.discourse-cdn.com/v4/letter/c/dc4da7/32.png) [@Confuzzleinator](https://forum.heroiclabs.com/u/Confuzzleinator)\
**Post date:** [May 4, 2022, 4:52pm UTC](https://forum.heroiclabs.com/t/using-values-from-async-function/2603/2 "2022-05-04T16:52:58Z")

</div>

I’d recommend reading up on using `async`, `await`, and general C# asynchronous concepts. You can find a great rundown [here](https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/).

In this bit of code, I’d recommend making your `ListGroups()` function `async`. Then change the line where you assign your `task` variable to something like:

```auto
var result = await nakamaConnection.Client.ListGroupsAsync(GameController.instance.nakamaConnection.Session, "Piq400%", 100);

```

By using the `await` keyword you avoid having to mess around with all the `task.ContinueWith()` stuff. Looping through the groups is then as easy as:

```auto
foreach(var group in result.Groups) {
    Debug.Log(group.name);
}

```

And then finally to return the result `return result;`  
The full code could look something like this:

```auto
public class GameManager : MonoBehaviour
{   
    private NakamaConnection nakamaConnection;
    private GameController gameController;

    private void Awake()
    {
        gameController = GameController.instance;
        nakamaConnection = gameController.nakamaConnection;
   }

    // Start is called before the first frame update
    async void Start()
    {
        IApiGroupList groups = await ListGroups();

        foreach (var group in groups.Groups)
        {
            Debug.Log(group.Name);
        }
        Debug.Log("GameManager - ListGroup | Gruppi letti correttamente");

    }

    async IApiGroupList ListGroups()
    {
        IApiGroupList result = await nakamaConnection.Client.ListGroupsAsync(GameController.instance.nakamaConnection.Session, "Piq400%", 100);
        return result;
    }
}

```

Let me know if this works or you need further help!

---

<div class="post-metadata">

**Author:** ![solidsnakeit](https://avatars.discourse-cdn.com/v4/letter/s/e19b73/32.png) [@solidsnakeit](https://forum.heroiclabs.com/u/solidsnakeit)\
**Post date:** [May 4, 2022, 7:07pm UTC](https://forum.heroiclabs.com/t/using-values-from-async-function/2603/3 "2022-05-04T19:07:17Z")

</div>

Thank you very much. I really appreciate. Now I read M$ documentation.

There was a little mistake in this row:

`async Task<IApiGroupList> ListGroups()`

Solved 🙂