TRIAGE-179: Update docs

Author: junias-rokt

README.md

@@ -480,7 +480,22 @@ Import the `SuccessResponse` and `FailureResponse` classes to write proper callb
 
 #### Identify
 
-The following is a full Identify example with error and success handling.  You can adapt the following example with `login`, `modify`, and `logout`.
+You can call `identify` without any parameters to identify with the current user's identities:
+
+```dart
+mpInstance?.identity
+    .identify()
+    .then(
+        (IdentityApiResult successResponse) =>
+            print("Success Response: $successResponse"),
+        onError: (error) {
+            var failureResponse = error as IdentityAPIErrorResponse;
+            print("Failure Response: $failureResponse");
+        }
+    );
+```
+
+Or with an identity request. The following is a full example with error and success handling. You can adapt the following example with `login`, `modify`, and `logout`.
 
 ```dart
 import 'package:mparticle_flutter_sdk/identity/identity_api_result.dart';
@@ -542,7 +557,22 @@ mpInstance?.identity
 
 #### Login
 
-Partial example - you can adapt the identify example above with login, modify, and logout.
+You can call `login` without any parameters:
+
+```dart
+mpInstance?.identity
+    .login()
+    .then(
+        (IdentityApiResult successResponse) =>
+            print("Success Response: $successResponse"),
+        onError: (error) {
+            var failureResponse = error as IdentityAPIErrorResponse;
+            print("Failure Response: $failureResponse");
+        }
+    );
+```
+
+Or with an identity request:
 
 ```dart
 var identityRequest = MparticleFlutterSdk.identityRequest;
@@ -561,7 +591,6 @@ mpInstance?.identity.login(identityRequest: identityRequest).then(
         var failureResponse = error as IdentityAPIErrorResponse;
         print("Failure Response: $failureResponse");
     });
-    
 ```
 
 #### Modify