Does this violate GDPR?

For school I have to use a service that stores passwords unencrypted. I don't want to use this service, but they require me. Their website also requires you to run proprietary JavaScript to make it worse. I live in the Netherlands, and something to note is that the passwords have been generated by the service itself, not me.

Also edit: They sent my password through Gmail too. I also reviewed the service's privacy terms and general ToS. Of course it …

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