README.md in rd_insightly-0.2.0 vs README.md in rd_insightly-0.2.1

@@ -23,10 +23,47 @@
 
     $ gem install rd_insightly
 
 ## Usage
 
-TODO: Write usage instructions here
+Need create a authorization, you can use the method:
+
+  Rdinsightly.create_authorization API_KEY
+
+With authorization created you can start use the features:
+
+To create a lead(*last_name required):
+
+```ruby
+  HASH_ATTRIBUTES = {name: '', email: '', company: '', phone: '', job_title: '', website: ''}
+  RdInsightly::Lead.create last_name, HASH_ATTRIBUTES
+```
+
+To find a lead:
+
+```ruby
+  lead = RdInsightly::Lead.find ID
+```
+
+To update a lead:
+  
+```ruby
+  lead = RdInsightly::Lead.find ID
+  lead.update HASH_ATTRIBUTES
+```
+
+To delete a lead:
+
+```ruby
+  lead = RdInsightly::Lead.find ID
+  lead.delete
+```
+
+To logout: 
+
+```ruby
+  RdInsightly.logout
+```
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake rspec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.