I like using CodeIgniter because I don't need composer. However, I am trying to install Shield for CodeIgniter (Authentication and Authorization for CodeIgniter 4) and I don't find how to install it without Composer.
Is it even possible?
Yes, it is mentioned in the documentation that Composer is needed, but this does not mean that it is not possible to install it manually. You can install manually, but this is not recommended. I have provided instructions for manual installation in the link below: