In old asynchronous situations where throwing is not supported and you must return an EventLoopFuture, like in a flatMap closure, you can return a failed future. 1) The basicstacktrace class template represents a snapshot of the whole stacktrace or its given part. Throw Abort(.unauthorized, reason: "Invalid Credentials")
404 error, default "Not Found" reason used. You can initialize it with an HTTP status and optional failure reason. This struct conforms to both AbortError and DebuggableError. We do not currently support propagating exceptions through Swift functions. Vapor provides a default error struct named Abort. Ubiquitous errors, like running out of memory or overflowing the stack. This middleware is added to the application by default and can be replaced with custom logic if desired. The handling of errors is done by ErrorMiddleware. AbortError and DebuggableError can be used to change the resulting response and logging respectively. Throwing or returning a Swift Error will result in a 500 status response and the error will be logged. While stack traces can be manually symbolicated, this is an extremely time-consuming task, and its much easier to upload the required dSYM files to. Route handlers can either throw an error or return a failed EventLoopFuture. Vapor builds on Swift's Error protocol for error handling.
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