Harmony and smart things app

i got a harmony elite remote today and i don’t seem to be able to add the harmony to my smart things? i go to new things and find harmony, then when it says add credentials i click google as that is what i used on everything else and it tells me google have stopped allowing this on android/ios, so then i goto add email and it tells me i have to sign up how i did in the first place?

so now I’m stuck, is there a way to add on a pc?

also I’ve added smart things to the harmony app which went fine and i can see my hive heating but i can control the tempreture? are you able to do this? will it not work as i can link harmony in the smarting app?

hopefully someone can help