Comment by golangman

I have been there many many times. This is the reason for writing that library, because there are no good solutions that cover 99% of your cases. RBAC is limited, ACL is a managing nightmare, DAC is also limited, and so on. What really hit me where those AWS IAM policies which are plain beautiful, hence this library.

However, usually major programming languages have some sort of ACL/RBAC module around.