add createStakeOrder mutation

db/seeds.rb

@@ -2,19 +2,11 @@
 
 AdminUser.create!(email: "admin@example.com", password: "password")
 
-user = User.create!(
+Currency.create!(name: "CAKE")
+
+User.create!(
   first_name: "Test",
   last_name: "User",
   email: "user@example.com",
   password: "password"
 )
-
-currency = Currency.create!(name: "CAKE")
-
-Balance.create!(
-  user_id: user.id,
-  currency_id: currency.id,
-  amount: rand * 10000
-)
-
-FiatBalance.create!(user_id: user.id, amount_cents: 15000)