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Often, you’ll end up with a lot of route handlers and want to logically isolate them from each other. For convenience, a Controller protocol is provided to help you do so. Implement the route(_ app: Application) method and register the controller in your Application.boot. Any middleware applied during a controller’s route() will not be applied to handlers outside of this controller. 
struct UserController: Controller {
    func route(_ app: Application) {
        app
            .use(UserMiddleware())
            .post("/create", handler: create)
            .post("/reset", handler: reset)
            .post("/login", handler: login)
    }

    func create(req: Request) async throws -> User {
        //
    }

    func reset(req: Request) async throws {
        //
    }

    func login(req: Request) async throws -> Token {
        //
    }
}

struct App: Application {
    func boot() {
        ...
        controller(UserController())
    }
}