Just to give you un update, our IT solved that with CSS. The code is visible but it appears a CSS login over that does not really allow you to see much more until you log in.

It is working.

Thank you Highland for the answer.

Therefore, I understand that there is not any way for robots to pass where there autentification requirements. Right? Just to confirm. This is our main concern, we get 30% of our SEO results directly to rooms and we would not like to loose those.

We already made the A/B tests and check the conversion rates and though we know we are loosing some users and making bounce higher the sales rates are much higher (about 30%).
We are working to solve this as well improving the product and the site but that would be other completely different thing.

Seems like making a decission where to ask to register is the real important thing then

Hi all,

We have an accommodation site that asks users only to register when they want to book a room, in the last step. Though this is the ideal situation when you have tons of users, nowadays we are having around 1500 - 2000 per day and making tests we found out that if we ask for a registration (simple, 1 click FB) we mail them all and through a good customer service we are increasing our sales.

That is why, we would like to ask users to register right after the home page ie Home/accommodation or and all the rest. I am not sure how can I make to make that content still visible to robots.
Will the authentication process block google crawling it? Maybe something we can do?

We are  not completely sure how to proceed so any tip would be appreciated.

Thank you all for answering.