Added to docs to explain authentication workflow

docs/src/usage/index.md

@@ -13,3 +13,16 @@ I am not going to provide you with a ton of awesome scripts that will leverage t
 That is on you.
 
 With that in mind, I would highly recommend you become familiar with the [Plugins](./plugins/index.md) provided and apply your own ingenuity to come up with your own scripts.
+
+## Authentication
+
+The first time you try to do anything which requires authentication, you will be automatically prompted for your credentials.
+This prompt will expect the `Synack Email` and `Synack Password`, which are fairly self explanitory, but it also asks for the `Synack OTP Secret`.
+
+The `Synack OTP Secret` is NOT the 8 digit code you pull out of Authy.
+Instead, it is a string that you must extract from Authy via a method similar to the one found [here](https://gist.github.com/gboudreau/94bb0c11a6209c82418d01a59d958c93).
+
+Use the above instructions at your own discression.
+I TAKE NO RESPONSIBILITY IF SOMETHING BAD HAPPENS AS A RESULT.
+
+Once you complete these steps, your credentials are stored in a SQLiteDB at `~/.config/synack/synackapi.db`.