Sorry for that mate, late reply though, you can login to hive.blog or peakD to do that, go to your account menu option and click on peakD setting is thats where you choose to do it from or look for settings in hive.blog just follow the due process and you will get this done successfully.
However login in to different communities doesn't make your account vornurable to any harm or for you to feel insecure about it. Unless you are using different phones to do this then you can go ahead to change it but if is a single login from on particular phone then I will advice you stick to your private key because is still secured.