README.md in proxy_tester-0.0.4 vs README.md in proxy_tester-0.0.5

@@ -477,14 +477,58 @@
 
 * use_user
 
 Set the user used to connect to the proxy.
 
+*Lookup user password using `users.csv`*
 
 ```ruby
 it 'blocks www.example.org for user "user1"' do
   use_proxy subject
   use_user 'user1'
+
+  visit 'http://www.example.org'
+
+  expect(page).to have_content('Access forbidden')
+  expect(page.status_code).to eq 403
+end
+```
+
+*Ask user for user name and user password*
+
+```ruby
+it 'blocks www.example.org for user' do
+  use_proxy subject
+  use_user :ask
+
+  visit 'http://www.example.org'
+
+  expect(page).to have_content('Access forbidden')
+  expect(page.status_code).to eq 403
+end
+```
+
+*Ask user for user password*
+
+```ruby
+it 'blocks www.example.org for user' do
+  use_proxy subject
+  use_user 'user', :ask_password
+
+  visit 'http://www.example.org'
+
+  expect(page).to have_content('Access forbidden')
+  expect(page.status_code).to eq 403
+end
+```
+
+*Build a special user name based on ENV*
+
+```ruby
+it 'blocks www.example.org for user' do
+  use_proxy subject
+  use_user 'user', :credential_merging
+  # => ENV['USER']-user
 
   visit 'http://www.example.org'
 
   expect(page).to have_content('Access forbidden')
   expect(page.status_code).to eq 403