It depends on the provider, but a universal method is to use an echo service to have your address emailed to you ...

On the web, go to Snapchat Accounts, then click on “Session Management.” There you will see a list of logged-in sessions that ...

If you're having trouble logging into your Google account because you can't remember your email address, go to Google's Find My Email page and follow the prompts. You'll need to be able to provide ...