1. A method comprising: receiving a request to access a resource of a computer system storing a first plurality of authorization plugins, the request comprising a call to a login class; identifying, by a hardware of the computer system, a second plurality of authorization plugins that is a proper subset of the first plurality of authorization plugins, wherein the login class references a configuration file specifying the second plurality of authorization plugins; executing, by the hardware of the computer system, each of the second plurality of authorization plugins, wherein a plurality of authorization decisions are generated by executing each of the second plurality of authorization plugins; and generating, by the hardware of the computer system, an overall authorization decision by combining the plurality of authorization decisions, wherein each of the plurality of authorization decisions is generated using an independent authorization process; determining, by the hardware of the computer system, whether to grant the request in view of the overall authorization decision.