I'm trying to log in using AWS Cognito by running the app after building it in Unity.

I couldn't log in properly, and when I tried debugging, I found the phrase "The type initializer for Amazon.AWSConfigs' thread an exception."

This error occurs when executing the following code:

Amazon.CognitoIdentityProvider.AmazonCognitoIdentityProviderClient provider =
            new Amazon.CognitoIdentityProvider.AmazonCognitoIdentityProviderClient(new Amazon.Runtime.AnonymousAWSCredentials(), regionTable[REGION]);

The app itself is built normally, but there seems to be a problem with logging in using AWS.

(I found this error in the PC and oculus environment.)

• Some of the answers told me to modify the Config file. But I couldn't find the Config file. The location of this file was also unknown.

• I found this answer "https://github.com/aws/aws-sdk-net/issues/310" but I couldn't apply this for me.

• I found this Document "https://docs.unity3d.com/kr/2021.1/Manual/upm-config.html#upmconfig" but the Config file didn't exist in this path. My environment is Mac.

additionally,

I use AWS SDK called aws-sdk-net45-3.7.193.0.

UnityInitializer.AttachToGameObject(this.gameObject);
Amazon.AWSConfigs.HttpClient = Amazon.AWSConfigs.HttpClientOption.UnityWebRequest;

In this code, my Project Cannot understand UnityInitializer, HttpClient, and HttpClientOption.

What else changes are needed in order to mitigate the above issue.