Update TOTP Face Documentation

The TOTP face header file documentation contained outdated instructions
for configuring the complication with TOTP credentials. This PR updates
the documentation to match what is expected in `totp_face.c`.

diff --git a/movement/watch_faces/complication/totp_face.h b/movement/watch_faces/complication/totp_face.h
index 19a2cd452374f79ff3fc4b286d8c672747937617..acdcc8b10170db6478b529e37d1fdd779904e1d8 100644 (file)
--- a/movement/watch_faces/complication/totp_face.h
+++ b/movement/watch_faces/complication/totp_face.h
@@ -48,15 +48,19 @@
  *  o SHA512
  *
  * Instructions:
- *  o Find your secret key(s) and convert them to the required format.
- *      o Use https://cryptii.com/pipes/base32-to-hex to convert base32 to hex
- *      o Use https://github.com/susam/mintotp to generate test codes for verification
- *  o Edit global variables in "totp_face.c" to configure your stored keys:
- *      o "keys", "key_sizes", "timesteps", and "algorithms" set the
- *        cryptographic parameters for each secret key.
- *      o "labels" sets the two-letter label for each key
- *        (This replaces the day-of-week indicator)
- *      o Once finished, remove the two provided examples.
+ *  o Find your secret key(s).
+ *      o Use https://github.com/susam/mintotp to generate test codes for
+ *        verification
+ *  o Edit global `credentials` variable in "totp_face.c" to configure your
+ *    TOTP credentials. The file includes two examples that you can use as a
+ *    reference. Credentials are added with the `CREDENTIAL` macro in the form
+ *    `CREDENTIAL(label, key, algorithm, timestep)` where:
+ *      o `label` is a 2 character label that is displayed in the weekday digits
+ *        to identify the TOTP credential.
+ *      o `key` is a string with the base32 encoded secret.
+ *      o `algorithm` is one of the supported hashing algorithms listed above.
+ *      o `timestep` is how often the TOTP refreshes in seconds. This is usually
+ *        30 seconds.
  *
  * If you have more than one secret key, press ALARM to cycle through them.
  * Press LIGHT to cycle in the other direction or keep it pressed longer to