How to train Casia-webface

I want to use arcface torch to train the CASIA webface dataset. But I encountered difficulties.
I download the dataset from [here](https://github.com/deepinsight/insightface/tree/master/recognition/_datasets_).Some blogs told me to set "num_classes" to 10572, but I found that the number of categories in the paper is 10575.The blog was published in 2020. "[insightface](https://github.com/deepinsight/insightface)" is different from that time.I can't find the documentation that tells me how to set up the config file.

Start with the linked CASIA-WebFace dataset and the arcface torch training setup; compare the downloaded identities with the 10572 and 10575 counts mentioned in the issue. Done means the current configuration values and a reproducible setup path are documented clearly enough for a newcomer to train the dataset.

Written by the indexing model from the issue text.