added UserController, UserDTO, CreateUser migration, User model

Sources/auth_service/Controllers/UserController.swift

@@ -0,0 +1,62 @@
+import Fluent
+import Vapor
+
+struct UserController: RouteCollection {
+    func boot(routes: any RoutesBuilder) throws {
+        let users = routes.grouped("users")
+
+        users.get(use: self.index)
+        users.post(use: self.create)
+        users.group(":userID") { user in
+            user.get(use: show)
+            user.put(use: update)
+            user.delete(use: self.delete)
+        }
+    }
+
+    @Sendable
+    func index(req: Request) async throws -> [UserDTO] {
+        try await User.query(on: req.db).all().map { $0.toDTO() }
+    }
+
+    @Sendable
+    func create(req: Request) async throws -> UserDTO {
+        let user = try req.content.decode(UserDTO.self).toModel()
+
+        try await user.save(on: req.db)
+        return user.toDTO()
+    }
+
+    @Sendable
+    func show(req: Request) async throws -> UserDTO {
+        guard let user = try await User.find(req.parameters.get("userID"), on: req.db) else {
+            throw Abort(.notFound)
+        }
+        return user.toDTO()
+    }
+
+    @Sendable
+    func update(req: Request) async throws -> UserDTO {
+        guard let user = try await User.find(req.parameters.get("userID"), on: req.db) else {
+            throw Abort(.notFound)
+        }
+        let updatedUser = try req.content.decode(User.self)
+        user.username = updatedUser.username
+        user.email = updatedUser.email
+        user.password = updatedUser.password
+        user.group = updatedUser.group
+        user.isSuperuser = updatedUser.isSuperuser
+        try await user.save(on: req.db)
+        return user.toDTO()
+    }
+
+    @Sendable
+    func delete(req: Request) async throws -> HTTPStatus {
+        guard let user = try await User.find(req.parameters.get("userID"), on: req.db) else {
+            throw Abort(.notFound)
+        }
+
+        try await user.delete(on: req.db)
+        return .noContent
+    }
+}