Refactor backend and add exception handlers (#189)

server/src/api/resolvers/guards/delete-many.guard.ts

@@ -0,0 +1,12 @@
+import { CanActivate, Injectable } from '@nestjs/common';
+import { PrismaService } from 'src/database/prisma.service';
+
+@Injectable()
+export class DeleteManyGuard implements CanActivate {
+  constructor(private prismaService: PrismaService) {}
+
+  async canActivate(): Promise<boolean> {
+    // TODO
+    return true;
+  }
+}