Angular http get returning undefined

I tried to find an answer here but couldn´t. I´m new to Angular and I made a service for consulting an API, I checked on postman and the request and headers are valid, but my code is compiling and returning the following error on browser:

ERROR TypeError: Cannot read properties of undefined (reading 'get')

My code:

 http:HttpClient;

  constructor() { 

    console.log("creates here");

  }

  getCurrencySymbolList() {

    console.log("gets here");
    console.log(`${this.apiUrl}${this.apiSymbols}`);

    this.http.get("www.google.com");
  }
}

Thanks in advance!