adds verified users concept

app/models/verified_user.rb

@@ -0,0 +1,12 @@
+# make sure document_type is being stored and queried in the correct format (Is it DNI? a number, a string?)
+class VerifiedUser < ActiveRecord::Base
+  scope :by_user,  -> (user)  { where(document_number: user.document_number,
+                                      document_type:   user.document_type) }
+
+  scope :by_email, -> (email) { where(email: email) }
+  scope :by_phone, -> (phone) { where(phone: phone) }
+
+  def self.phone?(user)
+    by_user(user).by_phone(user.unconfirmed_phone).first.present?
+  end
+end