Here 2 simple steps to share the account

First step Go in the manage your account section and select the option Password. gestione del tuo account e seleziona l’opzione PasswordDefine a new password and then share it with your username (email used to login) with your friend. Attention! If you used Apple to register, your email will be encrypted. Selecting Profile You will find your username (email) that will appear like this:
gvq2345dgp@privaterelay.appleid.com. Dovrai fornire questa al tuo amico. If you used Google. to login you will need to provide your @gmail.com email with the password you defined in the first step.

Second step Your friend will be able to access to the app selecting the option "use the share login", where he/she has to insert email and password you provided. The main user will continue to login using Apple or Google, while the second user will use email and custom password.