@Rustmilian Just did that and that is exactly what I needed, but in this case it didn't work. In this page https://docs.aws.amazon.com/systems-manager/latest/userguide/session-manager-prerequisites.html they explain that what the manager does is creating another root account in the instance, and that new account is the one that can disable its own permissions. So, I ended up with the same problem of having to configure everything for the new user. However I'm done with the laziness and I'm gonna do it lol, everyone else pointed out that not having a regular user is a security issue and they are right. If I had configured the instance from the beginning with the SSM, I could have skipped all that work, but the reality is that I have to do it
After I'm done configuring everything, I think I'll set up the rest of the instances to work with the SSM so that I don't have to go through all that again
Thanks for the help!