Update README.md

Author: Chris Wiechmann

README.md

@@ -950,26 +950,22 @@ If you are using an existing Elastic Search environment including Kibana, the fo
 
 #### Required users and roles
 
+The following table represents a suggestion of which roles should be created for the solution to work. You are also welcome to divide the roles differently and assign them to the users accordingly.
+
 | Role                  | Cluster privileges                                                    | Index privileges | Kibana        |
 | :---                  | :---                                                                  | :---             | :---          | 
 | axway_apigw_indicies  | `monitor`,                                                            | `apigw-* - All`  | None          | 
 | axway_manage          | `monitor`, `manage_ilm`, `manage_index_templates`, `manage_transform` | None             | None          | 
 
 The following table assumes that the same user should also be used for stack monitoring. You can also split this into two users if necessary.
 
-| Username                  | Roles                                            | Comment                                               |
-| :---                      | :---                                             | :---                                                  | 
-| axway_logstash            | `axway_apigw_indicies`, `logstash_system`        |                                                       | 
-| axway_apibuilder          | `axway_apigw_indicies`, `axway_manage`           |                                                       | 
-| axway_filebeat            | `beats_system`                                   | `beats_system` role required to send monitoring data. | 
-
+| Username                  | Roles                                            | Comment                                                        |
+| :---                      | :---                                             | :---                                                           | 
+| axway_logstash            | `axway_apigw_indicies`, `logstash_system`        | Parameter: `LOGSTASH_USERNAME` and `LOGSTASH_SYSTEM_USERNAME`  | 
+| axway_apibuilder          | `axway_apigw_indicies`, `axway_manage`           | Parameter: `API_BUILDER_USERNAME`                              | 
+| axway_filebeat            | `beats_system`                                   | Parameter: `BEATS_SYSTEM_USERNAME`                             | 
 
-  - Logstash-User 
-    - used to ingest data and send monitoring data
-  - 
-  - 1 user to ingest data into Elasticsearch using Logstash (e.g. logstash_axway)
-  - 1 user to query and setup Elasticsearch with API-Builder
-  - Of course it’s also possible to use the same user for both
+Kibana users are not included in this overview. 
 
 ### Size your infrastructure