fix(structure): structure id creation

src/structures/services/structures.service.ts

 import { HttpException, HttpService, Injectable, HttpStatus } from '@nestjs/common';
 import { InjectModel } from '@nestjs/mongoose';
-import { Document, Types } from 'mongoose';
-import { Model } from 'mongoose';
+import { Types, Model } from 'mongoose';
 import { Observable } from 'rxjs';
 import { AxiosResponse } from 'axios';
 import { Structure, StructureDocument } from '../schemas/structure.schema';
@@ -23,6 +22,7 @@ export class StructuresService {
       throw new HttpException('Invalid profile', HttpStatus.NOT_FOUND);
     }
     const createdStructure = new this.structureModel(structureDto);
+    createdStructure._id = Types.ObjectId();
     createdStructure.save();
     user.structuresLink.push(createdStructure._id);
     user.save();