Dealing with cold start users click history

[igor17400]

Hello! I'm currently handling a dataset where the histories column might initially be empty, especially for users who are accessing the system for the first time.

Given this context, I'm seeking advice on how to approach a particular situation highlighted in the code found at this GitHub link. The process involves tokenizing the titles of previously clicked news articles, but I'm facing a potential cold start issue for new users without any history. In these instances, should I consider tokenizing empty titles, abstracts, etc.?