How can I update a Cognito User Attribute from C# code using Hosted UI?

Question

I'm using Cognito Hosted UI with a C# project i can get current user details, but i can't update the current user attributes.
I'm on a track to find the solution. I believe using the UpdateUserAttributesAsync function from Amazon.CognitoIdentityProvider, but I'm not sure how to get the AccessToken from the UpdateUserAttributesRequest class.
Would it be possible to guide me or tell me how to modify the attributes of a user?

```
AWSCredentials awsCredentials = new BasicAWSCredentials("accessKey", "secretKey");

AmazonCognitoIdentityProviderClient cognitoClient = new(awsCredentials);

UpdateUserAttributesRequest updateUserAttributesRequest = new()
{ 
     //AccessToken = Azure.Core.Token
 };

List userAttributes = new()
{
       new AttributeType() { Name = "email", Value = "allo@test.com" },
       new AttributeType() { Name = "custom:PhoneNumber", Value = "888 888 8888" }
};

updateUserAttributesRequest.UserAttributes = userAttributes;
var testss = await cognitoClient.UpdateUserAttributesAsync(updateUserAttributesRequest);
```

Accepted Answer

Hi, i found my answer.
You can get the accessToken from this function below and here is the link for stackoverflow answer.
https://stackoverflow.com/questions/66258459/how-to-get-aws-cognito-access-token-with-username-and-password-in-net-core-3-1

```
public static async Task GetCredsAsync()
        {
            AmazonCognitoIdentityProviderClient provider = new AmazonCognitoIdentityProviderClient(new AnonymousAWSCredentials(), Amazon.RegionEndpoint.USEast1);
            CognitoUserPool userPool = new("", "", provider, "");
            CognitoUser user = new("", "", userPool, provider, "");
            InitiateSrpAuthRequest authRequest = new()
            {
                Password = ""
            };

AuthFlowResponse authResponse = await user.StartWithSrpAuthAsync(authRequest).ConfigureAwait(false);
            var accessToken = authResponse.AuthenticationResult.AccessToken;
            return accessToken;
        }
```

How can I update a Cognito User Attribute from C# code using Hosted UI?

Contenuto pertinente