Amazon.Runtime.InstanceProfileAWSCredentials.GetRefreshState C# (CSharp) Method

        private CredentialsRefreshState GetRefreshState()
        {
            SecurityInfo info = GetServiceInfo();
            if (!string.IsNullOrEmpty(info.Message))
            {
                throw new AmazonServiceException(string.Format(CultureInfo.InvariantCulture, 
                    "Unable to retrieve credentials. Message = \"{1}\".",
                    info.Message));
            }
            SecurityCredentials credentials = GetRoleCredentials();

            CredentialsRefreshState refreshState = new CredentialsRefreshState
            {
                Credentials = new ImmutableCredentials(credentials.AccessKeyId, credentials.SecretAccessKey, credentials.Token),
                Expiration = credentials.Expiration
            };

            return refreshState;
        }