Fix bank account redact

README.md

@@ -360,6 +360,10 @@ bank_account = client.bank_accounts.find('1')
 ```ruby
 bank_account.deactivate
 ```
+Optionally a *mobile_pin* can be passed as argument.
+```ruby
+bank_account.deactivate('mobile_pin')
+```
 #####Get a bank account's users
 ```ruby
 bank_account.user

lib/promisepay/models/bank_account.rb

@@ -19,7 +19,7 @@ def user
     # @param mobile_pin [String] Mobile PIN.
     #
     # @return [Boolean]
-    def deactivate(mobile_pin)
+    def deactivate(mobile_pin = nil)
       @client.delete("bank_accounts/#{id}", mobile_pin: mobile_pin)
       @attributes['active'] = false
       true

spec/promisepay/models/bank_account_spec.rb

@@ -8,17 +8,28 @@
     end
   end
 
+  let(:account2) do
+    VCR.use_cassette('bank_accounts_single_2') do
+      client.bank_accounts.find('a4355e4c-25e4-49e3-88bf-63de71bbbea9')
+    end
+  end
+
   describe 'user', vcr: { cassette_name: 'bank_accounts_user' } do
     it 'gives back the account owner' do
       expect(account.user).to be_a(Promisepay::User)
     end
   end
 
   describe 'deactivate' do
-    it 'deactivates the account', vcr: { cassette_name: 'bank_accounts_deactivated' } do
+    it 'with mobile-pin', vcr: { cassette_name: 'bank_accounts_deactivated' } do
       expect(account.active).to be(true)
       account.deactivate('123')
       expect(account.active).to be(false)
     end
+    it 'without mobile-pin', vcr: { cassette_name: 'bank_accounts_deactivated_no_pin'} do
+      expect(account2.active).to be(true)
+      account2.deactivate()
+      expect(account2.active).to be(false)
+    end
   end
 end