How to index site pages that are available only after registration?

Question

Google

How to index site pages that are available only after registration?

Answer 1

If your resource has pages with hidden content, then they will not rank highly in the search. If you want to catch up with traffic and get registrations, use other methods and tools.
But for this:

Define a search bot and give it the necessary content

you can completely get a ban and be completely without organic visitors)

Answer 2

If the pages require registration, they most likely contain personal information.
Those. These pages do not need to be indexed.

Answer 3

Define a search bot and give it the right content