Disclaimer: Passwords for community servers change frequently. A static password rarely works for more than a few months. As of this article’s publication, here is the standard methodology to find the live password.

However, there is no official "Cambalache 2" campaign from Valve, so any password would be specific to that particular custom add-on. Here's what I can offer as a helpful guide:

You typically need to type the word into the in-game chat or interact with the specific object related to the prompt.

If you are searching for a password, you are likely trying to join a specific server running this map. There are two common reasons a server running Cambalache 2 would be password-protected:

: Entering this password near the start of the campaign allows you to obtain a powerful sledgehammer melee weapon.