Create a User without asking them to set their password?

I’m developing a new integration between SFDC and an external system. Almost everything is working fine, but I’m facing some issues when creating a new user.

For now, the main problem is when I create a new User by API. I set his password with System.setPassword(userId, password);, but the first time they log in it still ask them to reset their password, on the other hand, documentation says

“When the user logs in with this password, they are not prompted to create a new password.”