README.md in matic-jwt-1.1.0 vs README.md in matic-jwt-1.2.0

@@ -18,10 +18,19 @@
 
     $ gem install matic-jwt
 
 ## Usage
 
-####With Grape
+### Plain Ruby
+
+Use `MaticJWT::Generator` to create JWT tokens or headers:
+```ruby
+generator = MaticJWT::Generator.new
+token = generator.token_for('my_client', 'my_super_secret', additional_payload: 'test')
+header = generator.authentication_header_for('my_client', 'my_super_secret', user_id: '[e-mail]')
+```  
+
+### With Grape
 
 Use ```:jwt_auth``` strategy and provide secret.
 ```ruby
    auth :jwt_auth, {
       secret: -> (client_name) { ::ApiClient.find_by!(name: client_name).secret }