When using this, where can a get a deep dive into the architecture and details around the system? I'm always hesitant to use third party Auth for fear that so

When using this, where can a get a deep dive into the architecture and details around the system? I'm always hesitant to use third party Auth for fear that some bug in our app would generate otps and I won't be able to fix that in an emergency because of a lack of familiarity/access to source code/database