Depending on your application's platform we have different SDKs for integrating DirectAuth:
These SDKs implement interactions with the Torus Network which are detailed more closely here and here. Each of the SDKs go into further detail with exact implementation details and example code within their readme's.
The steps for integration are:
Reach out to firstname.lastname@example.org or our dev chat to get a test-net spun up to play with today or get started with Designing Your Key Management Architecture. If you're looking to get your hands dirty, head to quick start