ApiFactory.kt

//ApiFactory to create TMDB Api
object Apifactory{
  
    //Creating Auth Interceptor to add api_key query in front of all the requests.
    private val authInterceptor = Interceptor {chain->
            val newUrl = chain.request().url()
                    .newBuilder()
                    .addQueryParameter("api_key", AppConstants.tmdbApiKey)
                    .build()

            val newRequest = chain.request()
                    .newBuilder()
                    .url(newUrl)
                    .build()

            chain.proceed(newRequest)
        }
  
   //OkhttpClient for building http request url
    private val tmdbClient = OkHttpClient().newBuilder()
                                .addInterceptor(authInterceptor)
                                .build()


  
    fun retrofit() : Retrofit = Retrofit.Builder()
                .client(tmdbClient)
                .baseUrl("https://api.themoviedb.org/3/")
                .addConverterFactory(MoshiConverterFactory.create())
                .addCallAdapterFactory(CoroutineCallAdapterFactory())
                .build()   

  
   val tmdbApi : TmdbApi = retrofit().create(TmdbApi::class.java)

}