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Developers often use hard-coding access controls like email address domains or whitelist user IDs to determine who can do what in their application. As your application grows, it becomes harder to maintain this hard-coded logic as they are spread out across different parts of your codebase. Complicated business logic can be extracted out of the application code itself and located in a central service that makes the authorization decisions. This removes the technical debt of all the authorization logic spread across the codebase and replaces it will a simple ALLOW/DENY conditional check.