Similar issue here: I simply don’t find a way to get the resource_template working.
Also customizing the input to be hidden seems to have no effect (homeassistant os)
input_text:
secret_owm_apikey:
initial: !secret owm_apikey
mode: password
homeassistant:
customize:
input_text.secret_owm_apikey:
hidden: true
resource_template: https://api.openweathermap.org/data/2.5/onecall?lat={{ state_attr("zone.home","latitude") }}&lon={{ state_attr("zone.home","longitude") }}&lang=de&units=metric&exclude=minutely&appid={{ states("input_text.secret_owm_apikey") }}
The expression evaluates fine with the template editor in the ui