The type 'AWSCredentials' exist in both AWSSDK.Core And AWSSDK error

Hello I am working on uploading video on AWS using Asp .net core. For that, I am trying to get access key and other credentials using the code below.

var profileCrendial= new CredentialProfileStoreChain();
AWSCredentials awsCredentials;
using (var user = new AmazonSecurityTokenServiceClient(awsCredentials))
{
}

and

using (var SClient = new AmazonSecurityTokenServiceClient(awsCredentials))
{
 var req = new AssumeRoleRequest
 {
 }
}

For that I have installed AWSSDK v2.3.55.2 and AWSSDK.S3 v3.3.111.28 from NuGet package. I am getting type 'AWSCredentials' exist in both AWSSDK.Core error on the following line.

AWSCredentials awsCredentials;

How can I rectify this error?