def upload_files(self, list_of_files):
        """upload_files on success of validation, this method uploads the give list of files to s3 bucket"""
        if self.__validation_result:
            self.count = 0  # local variable which tells count of files uploaded in S3 Buckets

            print(
                "Sample of file to be uploaded to S3 Buckets are \t {} ".format(
                    list_of_files[:20]))
            for each_file in tqdm(list_of_files):
                try:
                    self.__s3_resource = boto3.resource(service_name='s3',
                                                        aws_access_key_id=self.__access_key,
                                                        aws_secret_access_key=self.__secret_access_key,
                                                        region_name=self.__region)
                    self.__s3_resource.Bucket(self.__bucket).upload_file(
                        Filename=each_file, Key=self.s3_file_name)
                    # .upload_file from boto3 package uploads file to s3
                    self.count += 1
                except Exception as e:
                    print("Failed to upload file\n {}".format(each_file, e))

        else:
            print("please update the credentials to proceed further")
        print("Total file successfully uploaded:\t {}".format(self.count))
        return True