QGIS Set Master Password

I installed a fresh version of the QGIS LTR 3.10. I am working on creating a postgres server from a raspberry pi4 and connecting the database to my qgis. Through a tutorial I am walking through, they suggest creating a Basic Authentication configuration (image 1). I type in a username and password, click the convert to configuration button and I receive a box asking for the current master password (image 2). I’ve tried researching how to find this and have only come across opening the qgis-auth.db file. I’ve opened it with a text editor, but its mainly a bunch of symbols that don’t make sense to me. So I am wondering how/where do I set up this master password?