As I try to boot up the manager in order to manage my currently installed plugins, QGIS tries to load some of my custom data/plugins repositories from work. Those need some specific credentials to access, they work on other computers.
As QGIS tries to load the first one, it freezes as it asks for my IDs. What I am looking for is a simple fix without needing to delete and install QGIS back again, maybe by somehow erasing the repositories without opening the extension tab or trying to load them for instance.