WIP auth, added Drift for database and refined shared_models for data exchange

backend/lib/service/db_access.dart

@@ -0,0 +1,24 @@
+import 'package:backend/database.dart';
+import 'package:drift/drift.dart';
+import 'package:logging/logging.dart';
+import 'package:uuid/uuid.dart';
+
+final log = Logger('Db');
+
+class Db {
+  static Future<User> getUser(String uuid) {
+    log.finer('Getting user $uuid');
+    return AppDatabase().managers.users.filter((f) => f.uuid.equals(uuid)).get().then((u) => u.first);
+  }
+
+  static Future<User?> createUser({required String username}) => AppDatabase()
+          .managers
+          .users
+          .createReturningOrNull(
+            (o) => o(createdAt: Value(DateTime.now()), uuid: const Uuid().v4(), name: username),
+          )
+          .catchError((Object err) {
+        log.severe('Failed to create user', err, StackTrace.current);
+        throw Exception(err.toString());
+      });
+}