Guard against unpermitted params in Rails

[bootcoder]

ep params renders the following on unpermitted params.

⬇ ⬇ ⬇ ⬇ ⬇  CLASS: ActionController::Parameters CALLER: controllers/gifts_controller.rb:27 ⬇ ⬇ ⬇ ⬇ ⬇
Completed 401 Unauthorized in 258ms (ActiveRecord: 3.0ms)



ActionController::UnfilteredParameters - unable to convert unpermitted parameters to hash:
  app/controllers/gifts_controller.rb:27:in `redeem'
  lib/cloud_flare_middleware.rb:20:in `call'

Started POST "/__better_errors/5907fc6f4c2b03db/variables" for 127.0.0.1 at 2019-06-05 15:23:49 -0700

Acceptance Criteria:

• Update gem
• Insert ep params into a Rails controller flow
• Pass non permitted params
• Observe valid extra print output of params
• Observe Red line informing params are unpermitted