diff --git a/README.md b/README.md
index a14311a..3751474 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,22 @@ Certificate methods:
     certificate.delete
   ```
 
+User methods
+
+- Setup Widget
+
+  ```ruby
+    args = {
+      email: 'some@email.com',
+      tax_id: 'AAA010101AAA',
+      callback_url: 'http://some-callback.url'
+    }
+
+    user = Mifiel::User.create(args)
+    user.widget_id
+  ```
+
+
 ## Contributing
 
 1. Fork it ( https://github.com/[my-github-username]/mifiel/fork )
diff --git a/lib/mifiel.rb b/lib/mifiel.rb
index fd24ef0..bc882fe 100644
--- a/lib/mifiel.rb
+++ b/lib/mifiel.rb
@@ -7,6 +7,7 @@ module Mifiel
   autoload :Certificate, 'mifiel/certificate'
   autoload :Template, 'mifiel/template'
   autoload :Config, 'mifiel/config'
+  autoload :User, 'mifiel/user'
 
   BASE_URL = 'https://www.mifiel.com/api/v1'.freeze
 
diff --git a/lib/mifiel/user.rb b/lib/mifiel/user.rb
new file mode 100644
index 0000000..22ed7cf
--- /dev/null
+++ b/lib/mifiel/user.rb
@@ -0,0 +1,27 @@
+module Mifiel
+  class User < Mifiel::Base
+    post :setup_widget, '/users/setup-widget'
+
+    # rubocop:disable Metrics/MethodLength, Metrics/AbcSize
+    def self.setup_widget(args)
+      email = args[:email]
+      tax_id = args[:tax_id]
+      callback_url = args[:callback_url]
+
+      raise ArgumentError, 'Email must be provided' unless email
+      raise ArgumentError, 'Tax id must be provided' unless tax_id
+      rest_request = RestClient::Request.new(
+        url: "#{Mifiel.config.base_url}/users/setup-widget",
+        method: :post,
+        payload: {
+          email: email,
+          tax_id: tax_id,
+          callback_url: callback_url
+        },
+        ssl_version: 'SSLv23'
+      )
+      req = ApiAuth.sign!(rest_request, Mifiel.config.app_id, Mifiel.config.app_secret)
+      Mifiel::User.new(JSON.parse(req.execute))
+    end
+  end
+end
diff --git a/mifiel.gemspec b/mifiel.gemspec
index 48c8536..c49be61 100644
--- a/mifiel.gemspec
+++ b/mifiel.gemspec
@@ -1,9 +1,9 @@
-# coding: utf-8
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+
 require 'mifiel/version'
 
-# rubocop:disable Metrics/BlockLength
+# rubocop:disable Metrics/BlockLength, Layout/ExtraSpacing
 Gem::Specification.new do |spec|
   spec.name          = 'mifiel'
   spec.version       = Mifiel::VERSION
@@ -19,9 +19,9 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
   spec.required_ruby_version = '~> 2.1'
 
-  spec.add_runtime_dependency 'rest-client',        '>= 1.8'
-  spec.add_runtime_dependency 'json',               '~> 1.8'
   spec.add_runtime_dependency 'api-auth',           '~> 1.4'
+  spec.add_runtime_dependency 'json',               '~> 1.8'
+  spec.add_runtime_dependency 'rest-client',        '>= 1.8'
   # Use Gem::Version to parse the Ruby version for reliable comparison
   # ActiveSupport 5+ requires Ruby 2.2.2
   if Gem::Version.new(RUBY_VERSION) > Gem::Version.new('2.2.2')
@@ -31,14 +31,14 @@ Gem::Specification.new do |spec|
   end
   spec.add_runtime_dependency 'flexirest', '~> 1.3.35'
 
+  spec.add_development_dependency 'bump',       '~> 0.5',   '>= 0.5.3'
   spec.add_development_dependency 'bundler',    '~> 1.6'
-  spec.add_development_dependency 'rake',       '~> 10.0'
-  spec.add_development_dependency 'rspec',      '~> 3.1',   '>= 3.1.7'
   spec.add_development_dependency 'byebug',     '~> 9.0',   '< 9.0.6'
   spec.add_development_dependency 'pry-byebug', '~> 3.4',   '>= 3.3.0'
-  spec.add_development_dependency 'bump',       '~> 0.5',   '>= 0.5.3'
-  spec.add_development_dependency 'webmock',    '~> 1.22',  '>= 1.22.2'
-  spec.add_development_dependency 'sinatra',    '~> 1.4',   '>= 1.4.7'
+  spec.add_development_dependency 'rake',       '~> 10.0'
+  spec.add_development_dependency 'rspec',      '~> 3.1',   '>= 3.1.7'
   spec.add_development_dependency 'rubocop',    '0.47.1'
   spec.add_development_dependency 'simplecov',  '~> 0.15'
+  spec.add_development_dependency 'sinatra',    '~> 1.4',   '>= 1.4.7'
+  spec.add_development_dependency 'webmock',    '~> 1.22',  '>= 1.22.2'
 end
diff --git a/spec/mifiel/user_spec.rb b/spec/mifiel/user_spec.rb
new file mode 100644
index 0000000..4ca9204
--- /dev/null
+++ b/spec/mifiel/user_spec.rb
@@ -0,0 +1,14 @@
+describe Mifiel::User do
+  describe '#setup_widget' do
+    let(:user) do
+      Mifiel::User.setup_widget(
+        email: 'user@email.com',
+        tax_id: 'AAA010101AAA',
+        callback_url: 'http://some-callback.url/mifiel'
+      )
+    end
+
+    it { expect(user.success).to be_truthy }
+    it { expect(user.widget_id).to_not be_nil }
+  end
+end
diff --git a/spec/support/fake_mifiel.rb b/spec/support/fake_mifiel.rb
index 7e71f35..65b79a4 100644
--- a/spec/support/fake_mifiel.rb
+++ b/spec/support/fake_mifiel.rb
@@ -99,6 +99,12 @@ class FakeMifiel < Sinatra::Base
     { bla: 'Correo enviado' }.to_json
   end
 
+  post '/api/v1/users/setup-widget' do
+    content_type :json
+    status 200
+    { widget_id: '123bc', success: true }.to_json
+  end
+
   private
 
     def template(args = {})