73's from the cold north... Adde / SM0SHG
That is an excellent question! I have been scratching my head over the same thing. For security reasons, I might want to change my e-mail address as well as password. The reason is I might give out this information for other users and regret it. It would be nice if individual assignments could be made for each user which could be changed only by the owner.
There are three different types of accounts you can use for SmartLink; Google, Facebook and your email (Auth0). These are separate and independent accounts. Meaning if you log in and register your radio with the Facebook account and then log in to a SmartSDR SmartLink client with your Google credentials, you will not have access to your radio because it is not registered with that account. And a radio can be only be registered to one account (but an account can have multiple radios registered with it).