EEG Dataset With Question-Answer Pairs For Authentication

I’m seeking sample datasets to train my model. I need data that represents both authenticated and non-authenticated users, so the model can learn to differentiate between them.

Background of my project :
I’m developing an authentication system using EEG data, inspired by Bycloud’s work on expressive hidden states in RNNs. I’m interested in applying a model-within-a-model approach to EEG data to authenticate users based on their thought processes rather than just their answers. I’m looking for guidance on incorporating questions that analyze how users think.