to use your existing accounts on your new box it will be a case of going into the respective app's and signing in using your existing account details, just like you would if logging into a new say, smartphone.
hope this helps and have a good day.
Here to help! I'm a technician helping out , all opinions are my own. Find out more
If you have found my response helpful today please take the time to mark my answer as helpful and give some Kudos.
Although I work for Vm all/most posts are of my own opinion