Hey, ​@Larry 

For this, you have to create 2 custom fields.

Example:

1. ID
2. Permanent_ID

When the user set the password for the first time, you need to save it as Permanent_ID.

Then, in the future conversations, probably you set a question asking the ID. In this question, you need to save the user’s response as ID. 

After that, you set a condition that ID is Permanent_ID.

Let me know if this helped

So the password is created by me and linked to the contact’s phone number as User_ID so there’s no need for the user to create a password.

I did try to save the user’s answer as “User_ID_input” and compare it with a condition in the first place (and the way you proposed) but it seems the way I’m doing it isn’t working. I guess that the flow wants the user to write “User_ID_input” to move forward instead of entering its password...

​@Larry 

I made a test here. Previously, I set up uPermanent_ID] to “test”.

Then, I answered the question with “test”

Oh, Ok!

Could you share with me how you put the fields in brackets in the condition bloc?

​@Larry 
You don’t need to put brackets. I put brackets in mine to differentiate which are used for tests or to use daily.

But if you want to add brackets, you can add them when you create a custom field.

Let me know if the automation already works

OK, I found what I was doing wrong! 

You need to click on the brackets icon when entering the custom field.

Thank you very much, it works now.