Missing required param: card - ruby-on-rails

Question

In setting up so users can create a new card on file for Stripe I am getting a Stripe::InvalidRequestError at /subscriptions/changecard. The error message is Missing required param: card and points to the line #customer.cards.create({:card => #user.subscription.stripe_card_token})
If the user has a subscription they should be able to visit /subscriptions/changecard and fill out the form which will add a new card.
Subscriptions controller:
def new
plan = Plan.find(params[:plan_id])
#subscription = plan.subscriptions.build
if params[:PayerID]
#subscription.paypal_customer_token = params[:PayerID]
#subscription.paypal_payment_token = params[:token]
#subscription.email = #subscription.paypal.checkout_details.email
end
end
def create
#subscription = Subscription.new(params[:subscription])
if #subscription.save_with_payment
redirect_to #subscription, :notice => "Thank you for subscribing!"
else
render :new
end
end
def show
#subscription = Subscription.find(params[:id])
end
def paypal_checkout
plan = Plan.find(params[:plan_id])
subscription = plan.subscriptions.build
redirect_to subscription.paypal.checkout_url(
return_url: new_subscription_url(:plan_id => plan.id),
cancel_url: root_url
)
end
def updatesubscription
#user = current_user
#customer = Stripe::Customer.retrieve(#user.subscription.stripe_customer_token)
#customer.update_subscription(:plan => "1", :prorate => true)
current_user.save!
flash.alert = 'Your subscription has been updated!'
redirect_to root_url
end
def cancelsubscription
#user = current_user
#customer = Stripe::Customer.retrieve(#user.subscription.stripe_customer_token)
#customer.cancel_subscription()
current_user.save!
flash.alert = 'Your subscription has been cancelled successfully!'
redirect_to root_url
end
def showcard
#user = current_user
Stripe::Customer.retrieve(#user.subscription.stripe_customer_token).cards.all()
end
def changecard
#user = current_user
#customer = Stripe::Customer.retrieve(#user.subscription.stripe_customer_token)
card = #customer.cards.create({
:card => #user.subscription.stripe_customer_token
})
#customer.default_card = card
#customer.save
end
end
View:
Add new Credit Card
<%= form_for #user do |f| %>
<% if #subscription.errors.any? %>
<div class="error_messages">
<h2><%= pluralize(#subscription.errors.count, "error") %> prohibited this subscription from being saved:</h2>
<ul>
<% #subscription.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.hidden_field :plan_id %>
<%= f.hidden_field :stripe_card_token %>
<div class="field">
<%= radio_button_tag :pay_with, :card, true %>
<%= label_tag :pay_with_card do %>
<%= image_tag "visa.png" %>
<%= image_tag "mastercard.png" %>
<%= image_tag "discover.png" %>
<%= image_tag "american_express.png" %>
<%= image_tag "jcb.png" %>
</div>
<% end %>
<div id="billing_fields">
<div class="field">
<%= f.hidden_field :user_id, :value => current_user.id %>
<%= f.label :email %>
<%= f.text_field :email %>
</div>
<% if #subscription.payment_provided? %>
Payment has been provided. Click "Subscribe" to complete the subscription.
<% else %>
<div class="field">
<%= label_tag :card_number, "Credit Card Number" %>
<%= text_field_tag :card_number, nil, name: nil %>
</div>
<div class="field">
<%= label_tag :card_code, "Security Code on Card (CVV)" %>
<%= text_field_tag :card_code, nil, name: nil %>
</div>
<div class="field">
<%= label_tag :card_month, "Card Expiration" %>
<%= select_month nil, {add_month_numbers: true}, {name: nil, id: "card_month"} %>
<%= select_year nil, {start_year: Date.today.year, end_year: Date.today.year+15}, {name: nil, id: "card_year"} %>
</div>
<% end %>
<div id="stripe_error">
<noscript>JavaScript is not enabled and is required for this form. First enable it in your web browser settings.</noscript>
</div>
<div class="actions">
<%= f.submit "New Card" %>
</div>
</div>
<% end %>
Routes:
get "subscriptions/cancelsubscription"
get "subscriptions/updatesubscription"
get "subscriptions/changecard"
resources :charges
resources :subscriptions
resources :plans
get 'paypal/checkout', to: 'subscriptions#paypal_checkout'