chore: change messages from hardcode to enum

src/modules/users/repositories/user-group.repository.ts

@@ -0,0 +1,12 @@
+import { Injectable } from "@nestjs/common";
+import { InjectRepository } from "@nestjs/typeorm";
+import { Repository } from "typeorm";
+
+import { UserGroup } from "../entities/user-group.entity";
+
+@Injectable()
+export class UserGroupRepository extends Repository<UserGroup> {
+  constructor(@InjectRepository(UserGroup) userGroupRepository: Repository<UserGroup>) {
+    super(userGroupRepository.target, userGroupRepository.manager, userGroupRepository.queryRunner);
+  }
+}