Rake task to create a new devise user

namespace :devise do
  desc "Create admin"
  task :create_admin, :email, :password, :needs => :environment do |t, args|
    if a = Admin.create(:email => args.email, :password => args.password)
      puts "Created admin"
    else 
      puts a.errors
    end    
  end
end  

Usage:

$> rake devise:create_admin["user@example.com","password"]