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You don't. Input<string> means "string isn't yet available, come back when it is".

Another question i have about this. how do i run for loop for example when the data is available? .apply(x => { for (let i = 0; i < x; i++) { // create database instance } })

In my opinion, generally: don't. If you don't know how many of a thing to create until after some other thing is created, then it's worth revisiting your design. If you are getting a count from a stack reference or config value, then also revisit. Just because you know you can loop 4 times doesn't mean it's the right thing to do. Calling the function 4 times in a row is sometimes better, and doubly-so for infrastructure.

Thank you for clearing thing up 🙂

You can call config.get() and if it's undefined, use the default.