README.markdown in visma_eaccounting-0.0.3 vs README.markdown in visma_eaccounting-0.0.4

@@ -1,6 +1,6 @@
-# visma_eaccounting
+# Visma eAccounting Ruby API Wrapper
 
 VismaEaccounting is an API wrapper for the Visma eAccounting [API](https://developer.vismaonline.com/).
 
 ## Important Notes
 
@@ -34,24 +34,25 @@
 ```
 
 You can read about `timeout` and `open_timeout` in the [Net::HTTP](https://ruby-doc.org/stdlib-2.3.3/libdoc/net/http/rdoc/Net/HTTP.html) doc.
 
 Now you can make requests using the resources defined in [the Visma eAccounting's docs](https://developer.vismaonline.com/#APIReference). Resource IDs
-are specified inline and a `CRUD` (`create`, `retrieve`, `update`, `upsert`, or `delete`) verb initiates the request. `upsert` lets you update a record, if it exists, or insert it otherwise where supported by Visma's API.
+are specified inline and a `CRUD` (`create`, `retrieve`, `update`, or `delete`) verb initiates the request.
 
 You can specify `headers`, `params`, and `body` when calling a `CRUD` method. For example:
 
 ```ruby
 visma_eaccounting.customers.retrieve(headers: {"SomeHeader": "SomeHeaderValue"}, params: {"query_param": "query_param_value"})
 ```
 
 Of course, `body` is only supported on `create` and `update` calls. Those map to HTTP `POST` and `PUT` verbs respectively.
 
-You can set `token`, `timeout`, `open_timeout`, `faraday_adapter`, `proxy`, `symbolize_keys`, `logger`, and `debug` globally:
+You can set `token`, `api_environment`, `api_endpoint`, `timeout`, `open_timeout`, `faraday_adapter`, `proxy`, `symbolize_keys`, `logger`, and `debug` globally:
 
 ```ruby
 VismaEaccounting::Request.token = "your_token"
+VismaEaccounting::Request.api_environment = :sandbox
 VismaEaccounting::Request.timeout = 15
 VismaEaccounting::Request.open_timeout = 15
 VismaEaccounting::Request.symbolize_keys = true
 VismaEaccounting::Request.debug = false
 ```
@@ -74,10 +75,10 @@
 
 Visma's [API documentation](https://developer.vismaonline.com/#APIReference) is a list of available endpoints.
 
 ## Environments
 
-The default environment is ```:production```. To use the sandbox environment you can set ```:sandbox``` in constructor or globally. This will set the default ```api_endpoint``` URL.
+The default environment is ```:production```. To use the sandbox environment you can set ```:sandbox``` in constructor or globally using the ```api_environment``` option. This will set the default ```api_endpoint``` URL.
 
 ## Debug Logging
 
 Pass `debug: true` to enable debug logging to STDOUT.
 
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