Hi! I've noticed the doc references postgres for setting up data storage (https://labelstud.io/guide/storedata.html). However, I was wondering whether it's possible to switch to other databases such as MySQL for the same task. If so, more or less how'd the process be? I'm trying to set up label-studio and the environment I'm using only allows MySQL DBs.

Thanks!

My actions before raising this issue

• [X ] Read/searched the docs
• [X ] Searched past issues

Current Behaviour

There is users list limit, but t

Let's add an error message that will be thrown when people call addData without an output argument in the call. See context in #990!

Modify 2_one-pixel-attack-imagenet.ipynb to download a sample subset of ImageNet files with appropriate labels. The files should be preprocessed as to be ready for the attack.

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