docs: add documentation for authentication

Author: codescape

docs/changelog.md

@@ -15,6 +15,7 @@ category: Administration
 * docs: provide documentation for REST API
 * docs: improve REST API documentation
 * docs: provide example payload in documentation
+* docs: add documentation for authentication
 
 ### [24.06.0] - 2024-06-30
 

docs/rest-api.md

@@ -13,6 +13,11 @@ Please make sure you have updates Multiple Subtasks for Jira to the latest versi
 * Table of Contents
 {:toc}
 
+### Authentication
+
+The REST API provided by Multiple Subtasks for Jira requires you to be authenticated as a valid and licensed user of Jira.
+Please see the documentation on [Basic Authentication](https://developer.atlassian.com/server/jira/platform/basic-authentication/) or [Personal Access Tokens](https://confluence.atlassian.com/enterprise/using-personal-access-tokens-1026032365.html) for different ways to identify as a valid user.
+
 ### Create Subtasks `POST /subtasks/{issueKey}`
 
     Request URL: /rest/multiple-subtasks/1.0/subtasks/{issueKey}
@@ -34,24 +39,24 @@ Create the subtasks from the payload for the given `issueKey`.
 
 This is an example for the payload in the request in order to create two subtasks:
 
-    - Hallo World
+    - Hello World
       fixVersion: unknown
-    - Hallo Moon
+    - Hello Moon
       label: rest-api-demo
 
 The plugin successfully creates two subtasks and responds with the following JSON:
 
     [
       {
         "issueKey": "YEAH-43",
-        "issueSummary": "Hallo World",
+        "issueSummary": "Hello World",
         "warnings": [
           "Invalid fixVersion: unknown"
         ]
       },
       {
         "issueKey": "YEAH-44",
-        "issueSummary": "Hallo Moon",
+        "issueSummary": "Hello Moon",
         "warnings": []
       }
     ]