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TypeError: Cannot read property 'get' of undefined

See original GitHub issue

When inject a service in controller using the decorator

How to reproduce:

import { Controller, GET, Inject } from "fastify-decorators";
import { AnyService } from "../services";

@Controller("/status")
export default class HelloController {
  @Inject(AnyService)
  private anyService: AnyService;

  @GET()
  async handler(): Promise<{ hello: string }> {
    try {
      console.log(this.anyService);
    } catch (e) {
      console.log(e);
    }
    return { hello:  "world" };
  }
}

TypeError: Cannot read property 'get' of undefined
    at StatusController.get [as cache] (/home/ferco/workspace/http-service-template/lib/decorators/inject.ts:26:42)
    at StatusController.<anonymous> (/home/ferco/workspace/http-service-template/src/controllers/status.controller.ts:35:24)
    at Generator.next (<anonymous>)
    at /home/ferco/workspace/http-service-template/src/controllers/status.controller.ts:17:71
    at new Promise (<anonymous>)
    at __awaiter (/home/ferco/workspace/http-service-template/src/controllers/status.controller.ts:13:12)
    at StatusController.handler (/home/ferco/workspace/http-service-template/src/controllers/status.controller.ts:41:16)
    at Object.<anonymous> (/home/ferco/workspace/http-service-template/lib/decorators/strategies/controller-type.ts:52:61)
    at preHandlerCallback (/home/ferco/workspace/http-service-template/node_modules/fastify/lib/handleRequest.js:120:28)
    at preValidationCallback (/home/ferco/workspace/http-service-template/node_modules/fastify/lib/handleRequest.js:103:5)