should ALPHAVANTAGE_API_KEY be a system or user variable

[Erik Colson]

Hello,

I'm also concerned by the declaration of an environment variable, but
more generally.  It feels wrong as it causes extra problems to common
users.

Therfor I'm thinking of adding an option hash to F::Q which would
contain the APIkey.  Thus the APIkey can be an option _inside_ gnucash
or other apps and no environment variable would need to be set.

Opinions are welcome.

best
--
erik colson