I want to work with multiple base url in retrofit2

[aumobiletools]

I have a structure whose base url address is constantly variable. When my user changes his location in the application, I change the base url to show the closest server to him. but the retrofit client does not regenerate even though I restart the activities and change all the static variables. The only way to do this is to close the application completely and restart it.

I don't have a fixed base url. There could be 4 different locations today, 12 different locations tomorrow. so i need to find a permanent solution.

I have examined a lot in debug mode, but; When the base url changes, it never goes inside the getClient and cannot reassign the base url.

GsonBuilder builder = new GsonBuilder();
builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
    @Override
    public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
        return new Date(json.getAsJsonPrimitive().getAsLong());
    }
});

Gson gson = builder.create();
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(new Interceptor() {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request().newBuilder()
                .addHeader("AUTHORIZATION", "" + JWT_TOKEN)
                .build();
        return chain.proceed(request);
    }
}).build();

if (retrofit == null) {
    retrofit = new Retrofit.Builder().baseUrl(baseUrl)
            .addConverterFactory(GsonConverterFactory.create(gson))
            .client(client)
            .build();
    return retrofit;
}

return retrofit;