Unlisted client pages. Search function?

I want to create client's pages for each of my clients where their download links, reference info etc. are stored for them to access. I figured I would do this by having an unlisted page with a password for each of them. And then the client contact ref. Would get an email with the url and their password. 
But now I'm thinking that I want to create a page with an input field and a “go” button that redirect them to the unlisted page url where they then can enter the password. (something like “enter your organisation here”) 
How do I create this? Without it being a search field from where everyone can search up my client list? 

Thank you guys!

22 minutes ago, Term20 said:

I want to create client's pages for each of my clients.

I'm thinking that I want to create a page with an input field and a “go” button that redirect them to the unlisted page url where they then can enter the password.

Years ago I wrote a guide explaining how to do something very similar.

Please take a look and see if it helps: Create a Client Login Area on Squarespace

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36 minutes ago, paul2009 said:

Years ago I wrote a guide explaining how to do something very similar.

Please take a look and see if it helps: Create a Client Login Area on Squarespace

Did this help? Please give feedback by clicking an icon below  ⬇️

That's exactly the kind of solution I'm looking for! Is there any reason why it's a five-digit ID and not just any length? 🙂 

32 minutes ago, Term20 said:

Is there any reason why it's a five-digit ID and not just any length? 🙂 

It is optional but it has been found to improve usability. A fixed length string helps users to know if they have entered the correct code. If they have missed a letter they'll see a hint.