The login is your email address which you entered during registration. If you forgot the login need to creat a new account in Elari SafeFamily application.
Also need to log out from the previous account: send your smart watch IMEI number to the support - https://elarihelp.freshdesk.com/en/support/tickets/new
If you forgot the password you can to restore it in Elari SafeFamily application:
Open Elari SafeFamily application-Forget-Follow the instructions (password should be more than 6 characters, restore the password possible only if you entered a correct email address)