Send automatic mail from code (JS) using group mail without using individual users credentials

Send automatic mail from code (JS) using group mail without using individual users credentials

Hello,
I just got my first subscription with Zoho for mail, and I want to send some emails from my JS app, such as email verifications, password resets etc. I am able to send emails from individual user accounts using their own personal credentials on Node Mailer. I do not want this as a few different people will access the code meaning they can see the password of the one user whose password is used. I have created a group, dedicated to the project where I added all the members of the project, and that all works perfectly for manual mail sending. I just do not know which password to use if I use the email of the group. I do not need to use node mailer so if there is a better API do let me know.

Any help is appreciated,
Thanks