CHANGELOG.md in clicksign-api-1.1.1 vs CHANGELOG.md in clicksign-api-1.1.2.alpha

@@ -1,15 +1,25 @@
 # Clicksign::API 1.1.0 (Octuber 29, 2021)
 
 Add support to multiple credentials.
-This is useful to work with different accounts and environments, providing flexibility.
+This is useful to work with different environments, providing flexibility.
 For example, applications have different tokens for each environment.
 Other useful case, occurs working with multiple companies.
 
-The credentials should be a hash.
+The credentials should be a hash. 
+It is possible use a `.yml` file to configure the authentication tokens.
+The `.yml` file can get the tokens using environment variables.
+Now all requests receive token parameter, that represents the key associated with the token.
 
+## Examples:
+
+YML file
+```yml
+key.production: 'CLICKSIGN_ACCESS_TOKEN_PRODUCTION'
+key.sandbox:    'CLICKSIGN_ACCESS_TOKEN_SANDBOX'
+```
+
 Request:
 ```ruby
 file = File.open('/path/to/file/local/file.pdf', 'r')
-response = Clicksign::API::Document.create(params: { path: '/path/to/file/on/clicksign.pdf', file: file }, token: 'key.production')
-# =>
-```
+response = Clicksign::API::Document.create( params: { path: '/path/to/file/on/clicksign.pdf', file: file }, token: 'key.production')
+```
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