adds i18n to residence document error

app/models/verification/residence.rb

@@ -30,7 +30,7 @@ class Verification::Residence
   end
 
   def document_number_uniqueness
-    errors.add(:document_number, "Already in use") if User.where(document_number: document_number).any?
+    errors.add(:document_number, I18n.t('errors.messages.taken')) if User.where(document_number: document_number).any?
   end
 
   def residence_in_madrid

config/i18n-tasks.yml

@@ -94,6 +94,7 @@ search:
 ignore_missing:
   - 'unauthorized.*'
   - 'errors.messages.blank'
+  - 'errors.messages.taken'
 
 ## Consider these keys used:
 ignore_unused:

spec/models/residence_spec.rb

@@ -31,7 +31,7 @@ describe Verification::Residence do
       residence2 = build(:verification_residence)
 
       residence.valid?
-      expect(residence.errors[:document_number]).to include("Already in use")
+      expect(residence.errors[:document_number]).to include("has already been taken")
     end
 
     it "should validate census terms" do