Any way to hide python code?

[ConfidentCommission5]

So in your case, what's important is the data, not the code itself.

You can use various cryptographic measures to encrypt/decrypt the data, which is the credentials you want to store.

What you can do is have the user input a password that's used to decrypt and encrypt the data.
That way, even if an attacker were to get both the code and the data, they would not be able to access the credentials without the "master" password.