Custom query run in action
I'm wondering how to run a regular query (SELECT ...) in an action for example using
my attempts fail. Seems I can't use the Repo module in an action 
Repo.query! Repo.query!action :activity_this_month, :map do
run fn input, _ ->
"""
SELECT * FROM my_table
"""
|> MyApp.Repo.query!()
end
end