before_action :lookup_user, :only => [:new, :create, :blocks_on, :blocks_by]
before_action :lookup_user_block, :only => [:show, :edit, :update, :revoke]
before_action :require_valid_params, :only => [:create, :update]
before_action :lookup_user, :only => [:new, :create, :blocks_on, :blocks_by]
before_action :lookup_user_block, :only => [:show, :edit, :update, :revoke]
before_action :require_valid_params, :only => [:create, :update]