Move lndhub admin token to env var/setting

app/models/setting.rb

@@ -113,6 +113,9 @@ class Setting < RailsSettings::Base
   field :lndhub_enabled, type: :boolean,
     default: (ENV["LNDHUB_API_URL"].present?.to_s || false)
 
+  field :lndhub_admin_token, type: :string,
+    default: ENV["LNDHUB_ADMIN_TOKEN"].presence
+
   field :lndhub_admin_enabled, type: :boolean,
     default: (ENV["LNDHUB_ADMIN_UI"] || false)
 

app/services/lndhub_v2.rb

@@ -14,7 +14,7 @@ class LndhubV2 < Lndhub
   end
 
   def create_account(payload={})
-    post "v2/users", payload, admin_token: Rails.application.credentials.lndhub[:admin_token]
+    post "v2/users", payload, admin_token: Setting.lndhub_admin_token
   end
 
   def create_invoice(payload)

app/views/admin/settings/services/_lndhub.html.erb

@@ -12,7 +12,12 @@
       key: :lndhub_api_url,
       title: "API URL"
     ) %>
-  <% end %>
+    <%= render FormElements::FieldsetResettableSettingComponent.new(
+      key: :lndhub_admin_token,
+      type: :password,
+      title: "Admin token",
+      description: "Auth token for creating new lndhub accounts"
+    ) %>
     <%= render FormElements::FieldsetToggleComponent.new(
       form: f,
       attribute: :lndhub_admin_enabled,
@@ -34,4 +39,5 @@
             description: "The public key of the Lightning node used by LNDHub"
           ) %>
     <% end %>
+  <% end %>
 </ul>