Spotcast not working - error in config file after reboot

Hi an am new to HA but loving so far.
the main reason for me was to automate music playing on various home device events and to create a follow music solution
in brief i am trying to automate when i enter a room a xiaomi motion sensor event will trigger a media music event either on Google home assitant or Amazon echo depending on the room. I have various of these around the house.
I have tred to get Spotcast installed and did so via HACS and code seems to install ok.
I then added
‘spotcast:
sp_dc: !secret key
sp_key: !secret key’

as per instructions
when i reboot HA i just get a config file error all the time

2020-09-17 16:05:29 ERROR (MainThread) [homeassistant.bootstrap] Failed to parse configuration.yaml: Secret key

can someone please help me understand am i doing something wrong here ?

I have spotify add-on installed and is working fine

thx

Hey there - going through the same issue. Did you ever resolve? Thanks!