Migrate from legacy FCM APIs to HTTP v1

Hi,

I used to be able to push Android apps using Google FCM. Google has now switched to V1 communication and my app no longer works. Google gave me a JS file. I need to rebuild my project but I couldn't find an example. Can you help me?

Old Code;

    oHTTP2.Request.CustomHeaders.Clear;

    oHTTP2.Request.CustomHeaders.Add('Content-Type: application/json');

    oHTTP2.Request.CustomHeaders.Add('Authorization: key='+a_akey);

    oHTTP2.Request.BearerAuthentication:=False;

    res:=oHTTP2.Post(a_url,sReq);

Thank you..