Creating sensor from an attribute

[Haze]

I am learning how to do some programming to be able to customize my front end.
I have a garbage sensor, and I would like to create a sensor that contains the Days attribute.
Here is the garbage Sensor:

I tested this in the developer tab, and it works:

This is my sensor:

platform: template
sensors:
  days_till_garbage_pickup:
    friendly_name: 'Days until garbage pickup'
    unique_id: days_till_garbage_pickup
    unit_of_measurement: Days
    value_template: "{{ state_attr('sensor.garbage_trash', 'Days') }}"

Does not show up. What am I doing wrong please?

[Tinkerer (aka DubhAd on GitHub)]

D is not d

Your image has days, your text has Days. These are different things.

[Haze]

yep, total shame…Ahhhhh!