docs: update readme and secrets baseline

Author: apaparazzi0329

.secrets.baseline

@@ -3,7 +3,7 @@
     "files": "package-lock.json|^.secrets.baseline$",
     "lines": null
   },
-  "generated_at": "2022-08-16T19:52:06Z",
+  "generated_at": "2024-02-26T18:58:05Z",
   "plugins_used": [
     {
       "name": "AWSKeyDetector"
@@ -78,11 +78,47 @@
   ],
   "results": {
     "README.md": [
+      {
+        "hashed_secret": "d4c3d66fd0c38547a3c7a4c6bdc29c36911bc030",
+        "is_secret": false,
+        "is_verified": false,
+        "line_number": 155,
+        "type": "Secret Keyword",
+        "verified_result": null
+      },
       {
         "hashed_secret": "32e8612d8ca77c7ea8374aa7918db8e5df9252ed",
         "is_secret": false,
         "is_verified": false,
-        "line_number": 651,
+        "line_number": 650,
+        "type": "Secret Keyword",
+        "verified_result": null
+      }
+    ],
+    "assistant/v2.ts": [
+      {
+        "hashed_secret": "4b28f8a2cf2d8920de88932ead405e6bddb15da2",
+        "is_secret": false,
+        "is_verified": false,
+        "line_number": 3637,
+        "type": "Secret Keyword",
+        "verified_result": null
+      }
+    ],
+    "discovery/v1.ts": [
+      {
+        "hashed_secret": "e8fc807ce6fbcda13f91c5b64850173873de0cdc",
+        "is_secret": false,
+        "is_verified": false,
+        "line_number": 5550,
+        "type": "Secret Keyword",
+        "verified_result": null
+      },
+      {
+        "hashed_secret": "fdee05598fdd57ff8e9ae29e92c25a04f2c52fa6",
+        "is_secret": false,
+        "is_verified": false,
+        "line_number": 5551,
         "type": "Secret Keyword",
         "verified_result": null
       }
@@ -138,7 +174,7 @@
         "hashed_secret": "1b214d8483f6b115656b6910c696e13e8881b66c",
         "is_secret": false,
         "is_verified": false,
-        "line_number": 674,
+        "line_number": 661,
         "type": "Secret Keyword",
         "verified_result": null
       }
@@ -148,15 +184,15 @@
         "hashed_secret": "789b49606c321c8cf228d17942608eff0ccc4171",
         "is_secret": false,
         "is_verified": false,
-        "line_number": 224,
+        "line_number": 221,
         "type": "Secret Keyword",
         "verified_result": null
       },
       {
         "hashed_secret": "6c475a361bc57d2e4e2f82a93d79efd8abc1c58b",
         "is_secret": false,
         "is_verified": false,
-        "line_number": 257,
+        "line_number": 254,
         "type": "Secret Keyword",
         "verified_result": null
       }
@@ -234,7 +270,17 @@
         "hashed_secret": "b8473b86d4c2072ca9b08bd28e373e8253e865c4",
         "is_secret": false,
         "is_verified": false,
-        "line_number": 5973,
+        "line_number": 5971,
+        "type": "Secret Keyword",
+        "verified_result": null
+      }
+    ],
+    "test/unit/discovery.v2.test.js": [
+      {
+        "hashed_secret": "b8473b86d4c2072ca9b08bd28e373e8253e865c4",
+        "is_secret": false,
+        "is_verified": false,
+        "line_number": 3471,
         "type": "Secret Keyword",
         "verified_result": null
       }
@@ -264,13 +310,13 @@
         "hashed_secret": "b8473b86d4c2072ca9b08bd28e373e8253e865c4",
         "is_secret": false,
         "is_verified": false,
-        "line_number": 435,
+        "line_number": 436,
         "type": "Secret Keyword",
         "verified_result": null
       }
     ]
   },
-  "version": "0.13.1+ibm.50.dss",
+  "version": "0.13.1+ibm.56.dss",
   "word_list": {
     "file": null,
     "hash": null

README.md

@@ -141,6 +141,24 @@ To use IAM authentication, you must use an `IamAuthenticator` or a `BearerTokenA
 
 To use the SDK in a Cloud Pak, use the `CloudPakForDataAuthenticator`. This will require a username, password, and URL.
 
+##### MCSP
+
+To use the SDK through a third party cloud provider (such as AWS), use the `MCSPAuthenticator`. This will require the base endpoint URL for the MCSP token service (e.g. https://iam.platform.saas.ibm.com) and an apikey. 
+
+```js
+import AssistantV2 from 'ibm-watson/assistant/v2'
+import { McspAuthenticator } from 'ibm-watson/auth';
+
+# In the constructor, letting the SDK manage the token
+const authenticator = new McspAuthenticator({
+    url: 'token_service_endpoint',
+    apikey: 'apikey',
+})
+const assistant = AssistantV2(version='2023-06-15',
+                        authenticator=authenticator)
+assistant.setServiceUrl('<url_as_per_region>')
+```
+
 ### Cloud Authentication Prioritization
 
 When uploading your application to IBM Cloud there is a certain priority Watson services will use when looking for proper credentials. The order is as follows: