Authenticating with REST API without using username and password

Hello!

I'm integrating SugarCRM with our product to import and push data. I'm planning on using the latest REST API v8.2. My question is that the authentication flow requires us to get the username and password from the user into our client. I was wondering if there was some other flow where we don't have to obtain the username and password from the user.

There was a discussion about this in the forum but that was over 3 years old, and ended with no proper solution.

Thanks for the help!