Add LndHub service, lnurl-pay endpoints

Enables the lnurl-pay payment workflow

app/jobs/create_lndhub_wallet_job.rb

@@ -2,14 +2,10 @@ class CreateLndhubWalletJob < ApplicationJob
   queue_as :default
 
   def perform(user)
-    res = Faraday.post("#{ENV["LNDHUB_API_URL"]}/create",
-                       { partnerid: "bluewallet", accounttype: "common" }.to_json,
-                       "Content-Type" => "application/json")
-
-    credentials = JSON.parse(res.body)
+    lndhub = Lndhub.new
+    credentials = lndhub.create({ partnerid: user.ou, accounttype: "user" })
 
     user.update! ln_login: credentials["login"],
                  ln_password: credentials["password"]
   end
-
 end