How and where do I find the 12 words to enable E2EE?

I’m brand new to Nextcloud, and I’m still learning to use it. As far as I understand, you need the 12 words Nextcloud provides to enable E2EE on its clients, which I don’t have nor know where or how to find.

So, how do I enable and find E2EE? Please help. Thank you!

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