Adds user confirmation rake task (#1300)

* Adds task to confirm user by email.

* Adds documentation for manual confirmation.

docs/Running-Mastodon/Administration-guide.md

@@ -35,3 +35,11 @@ You are able to set the following settings:
 - Site extended description
 
 You may wish to use the extended description (shown at https://yourmastodon.instance/about/more ) to display content guidelines or a user agreement (see https://mastodon.social/about/more for an example).
+
+## Confirming Users Manually
+
+The following rake task:
+
+    RAILS_ENV=production bundle exec rails mastodon:confirm_email USER_EMAIL=alice@alice.com
+
+Will confirm a user manually, in case they don't have access to their confirmation email for whatever reason.

lib/tasks/mastodon.rake

@@ -10,6 +10,15 @@ namespace :mastodon do
     puts "Congrats! #{user.account.username} is now an admin. \\o/\nNavigate to #{admin_settings_url} to get started"
   end
 
+  desc 'Manually confirms a user with associated user email address stored in USER_EMAIL environment variable.'
+  task confirm_email: :environment do
+    email = ENV.fetch('USER_EMAIL')
+    user = User.where(email: email)
+    user.update(confirmed_at: Time.now.utc)
+
+    puts "User #{email} confirmed."
+  end
+
   namespace :media do
     desc 'Removes media attachments that have not been assigned to any status for longer than a day'
     task clear: :environment do