Fix deprecation warnings

app/models/user.rb

@@ -27,8 +27,7 @@ class User < ApplicationRecord
   scope :confirmed, -> { where.not(confirmed_at: nil) }
   scope :pending,   -> { where(confirmed_at: nil) }
 
-  lockbox_encrypts :ln_login
-  lockbox_encrypts :ln_password
+  has_encrypted :ln_login, :ln_password
 
   # Include default devise modules. Others available are:
   # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable

config/application.rb

@@ -22,7 +22,7 @@ Bundler.require(*Rails.groups)
 module Akkounts
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 6.0
+    config.load_defaults 7.0
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers