aws_resources_guest_user.cs

using Amazon;
using Amazon.CognitoIdentity;
using UnityEngine;
using Amazon.Lambda;
using Amazon.Lambda.Model;
using System.Threading.Tasks;
using System.Text;

public class InvokeLambdaGuestUser : MonoBehaviour
{
    async void Start()
    {
        string invokeResult = await InvokeLambdaFunction();
        print($"Invoking Lambda function: {invokeResult}");
    }

    private async Task<string> InvokeLambdaFunction()
    {
        // Building AWS Credentials
        CognitoAWSCredentials credentials = new CognitoAWSCredentials(
            "us-east-1:40f5ec2d-3eda-4b6f-ae9d-562a9768f17f", // Your Identity Pool ID here
            RegionEndpoint.USEast1 // Your region here
        );

        // Building Lambda Client
        AmazonLambdaClient client = new AmazonLambdaClient(credentials, RegionEndpoint.USEast1);

        InvokeRequest request = new InvokeRequest
        {
            FunctionName = "awsResourcesFunction",
            InvocationType = InvocationType.RequestResponse
        };

        // Invoking Lambda function
        InvokeResponse response = await client.InvokeAsync(request);

        if (response.FunctionError == null && response.StatusCode == 200)
        {
            return Encoding.ASCII.GetString(response.Payload.ToArray());
        }

        return "Error invoking Lambda function.";
    }
}