Refactor 4 with bugfixes

server/src/cqrs/queries/handlers/getUserById.ts

@@ -0,0 +1,11 @@
+import { DataSource } from 'typeorm';
+import { AuthUserEntity } from '../../../entities';
+import { GetUserByIdQuery } from '../../types';
+import { rowToAuthUser } from '../../mappers';
+
+export async function handleGetUserById(query: GetUserByIdQuery, dataSource: DataSource) {
+  const repo = dataSource.getRepository(AuthUserEntity);
+  const row = await repo.findOne({ where: { id: query.payload.userId } });
+
+  return row ? rowToAuthUser(row) : null;
+}