You can log in to your other account by following the steps below:
1. From the main menu, click on the Settings icon.
2. From the “Account” settings, click on the “Use another account” option.
You will see three to four options depending on your device:
-Verified account 
-Huawei ID or Apple ID (this option may not be available on some accounts)
3. Choose the login method you want, login to your account, and then complete the registration process.
Note: Please make sure you are signing in to another account and not the same account you're trying to sign in from.