feat: Reorganizes files.

Sources/App/Controllers/DB/UserDB.swift

@@ -0,0 +1,36 @@
+import Fluent
+import Vapor
+
+struct UserDB {
+
+  func create(_ model: User.Create, on db: any Database) async throws -> User.DTO {
+    guard model.password == model.confirmPassword else {
+      throw Abort(.badRequest, reason: "Passwords did not match.")
+    }
+    let user = try User(
+      username: model.username,
+      email: model.email,
+      passwordHash: Bcrypt.hash(model.password)
+    )
+    try await user.save(on: db)
+    return user.toDTO()
+  }
+
+  func login(user: User, on db: any Database) async throws -> UserToken {
+    let token = try user.generateToken()
+    try await token.save(on: db)
+    return token
+  }
+
+  func fetchAll(on db: any Database) async throws -> [User.DTO] {
+    try await User.query(on: db).all().map { $0.toDTO() }
+  }
+
+  func delete(id: User.IDValue, on db: any Database) async throws {
+    guard let user = try await User.find(id, on: db) else {
+      throw Abort(.notFound)
+    }
+    try await user.delete(on: db)
+  }
+
+}