docs: change usage

Author: uwzm

README.md

@@ -136,13 +136,13 @@ module is set to demjson3 per default. The backend can be modified by calling
 
 Since version 2.0.0 this client supports general OData models hosted by FROST servers with active OData plugin.
 
-For this purpose the client provides a command line interface for generating a service configuration module containing the URL of the FROST server in use as well as source code for the Python classes corresponding to the data model contained in it. It is called like this:
+For this purpose the client provides a command line interface for generating a service module containing the URL of the FROST server in use as well as source code for the Python classes corresponding to the data model contained in the server. It is called like this:
 ```bash
-frost-codegen --url http://localhost:8080/FROST-Server --out my_service_configuration
+frost-codegen --url http://localhost:8080/FROST-Server --out my_service_module
 ```
 The generator tries the OData 4.01 endpoint of the FROST server in use first and falls back to the OData 4.0 if the other one is not available. If even the latter is not available the generator fails.
 
-In order to use the generated service configuration module, it needs to be imported in the source code. The corresponding service needs to be created with paramter `config` instead of `url`. In case the FROST server in use contains the SensorThings data model, the following two programs are equivalent:
+In order to use the generated module, it needs to be imported in the source code. The corresponding service needs to be created with parameter `model` instead of `url`. In case the FROST server in use contains the SensorThings data model, the following two programs are equivalent:
 
 Variant I:
 ```
@@ -164,11 +164,10 @@ service.create(thing)
 Variant II:
 ```
 import frost_sta_client as fsc
-import my_service_configuration
+import my_service_module as mdl
 from geojson import Point
 
-service = fsc.SensorThingsService(config=my_service_configuration)
-mdl = service.model
+service = fsc.SensorThingsService(model=mdl)
 
 point = Point((-115.81, 37.24))
 location = mdl.Location(name="here", description="and there", location=point, encoding_type='application/geo+json')