text: public STSAssumeRoleSessionCredentialsProvider(AlibabaCloudCredentials longLivedCredentials,string roleArn,IClientProfile clientProfile){AlibabaCloudCredentialsProvider longLivedCredentialsProvider =new StaticCredentialsProvider(longLivedCredentials);this.roleArn = roleArn;roleSessionName = GetNewRoleSessionName();stsClient = new DefaultAcsClient(clientProfile, longLivedCredentialsProvider);}