Fix credentials -> secrets

app/mailers/application_mailer.rb

@@ -1,4 +1,4 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: "noreply@#{Rails.application.credentials.domain}"
+  default from: "noreply@#{Rails.application.secrets.domain}"
   layout 'mailer'
 end

app/mailers/notify_lack_mailer.rb

@@ -6,7 +6,7 @@ def lack_exist_email(cars)
               else
                 '乗車記録に欠落があります'
               end
-    mail(to: Rails.application.credentials.mailing_list_address,
+    mail(to: Rails.application.secrets.mailing_list_address,
          subject:)
   end
 end

app/views/user_mailer/activation_needed_email.text.erb

@@ -1,8 +1,8 @@
-Welcome to <%= Rails.application.credentials.site_domain %>, <%= @user.name %>
+Welcome to <%= Rails.application.secrets.site_domain %>, <%= @user.name %>
 ===============================================
 
-You have successfully signed up to  <%= Rails.application.credentials.site_domain %>.
+You have successfully signed up to  <%= Rails.application.secrets.site_domain %>.
 
 To login to the site, just follow this link: <%= @url %>.
 
-Thanks for joining and have a great day!
+Thanks for joining and have a great day!

config/environments/production.rb

@@ -84,5 +84,5 @@
   config.active_record.dump_schema_after_migration = false
 
   # custom configs
-  config.action_mailer.default_url_options = { host: Rails.application.credentials.site_domain, protocol: 'https' }
+  config.action_mailer.default_url_options = { host: Rails.application.secrets.site_domain, protocol: 'https' }
 end

config/initializers/action_mailer.rb

@@ -1,7 +1,7 @@
 ActionMailer::Base.smtp_settings = {
   user_name: 'apikey',
-  password: Rails.application.credentials.sendgrid_api_key,
-  domain: Rails.application.credentials.domain,
+  password: Rails.application.secrets.sendgrid_api_key,
+  domain: Rails.application.secrets.domain,
   address: 'smtp.sendgrid.net',
   port: 587,
   authentication: :plain,

lib/tasks/scheduler.rake

@@ -3,6 +3,6 @@ task wake_up: :environment do
   require 'net/http'
   require 'uri'
 
-  url = URI.parse("https://#{Rails.application.credentials.site_domain}")
+  url = URI.parse("https://#{Rails.application.secrets.site_domain}")
   Net::HTTP.start(url.host, url.port) { |http| http.get('/') }
 end