I've got a `PlayersModule` and an `ItemsModule`.

I want to use the `ItemsService` in the `PlayersService`.

When I add it by injection:

```
import { Injectable } from '@nestjs/common';
import { InjectModel } from 'nestjs-typegoose';
import { ModelType, Ref } from 'typegoose';
import { Player } from './player.model';
import { Item } from '../items/item.model';
import { ItemsService } from '../items/items.service';

@Injectable()
export class PlayersService {
    constructor(
        @InjectModel(Player) private readonly playerModel: ModelType<Player>,
        private readonly itemsService: ItemsService){}

```

I get this nest error :

> 
> [Nest] 11592 - 2018-8-13 11:42:17 [ExceptionHandler] Nest can't
>  resolve dependencies of the PlayersService (+, ?). Please make sure
>  that the argument at index [1] is available in the current context.
> 
> 
> 

Both modules are imported in the `app.module.ts`. Both services are working alone in their module.