Three codes were hidden in the HTML source of the Harmony and Discord post on the Investigate Ingress blog.

[1] wfj21olxzo434kf

[2] vye528u5173rxc6

[3] ijo21qdbtqrhnm184lp

Code #1

Observations

Passcode format is there, go through your usual cipher routine.

Code #2

Observations

15 characters with the right amount of numbers for a valid passcode

Code #3

Observations

Remember to apply the same method to the keyword