Update dart EXAMPLES.md

docs/sdks/dart/EXAMPLES.md

@@ -18,10 +18,10 @@ Create a new user:
 Users users = Users(client);
 
 User result = await users.create(
-    userId: '[USER_ID]',
-    email: 'email@example.com',
-    phone: '+123456789',
-    password: 'password',
+    userId: ID.unique(),
+    email: "email@example.com",
+    phone: "+123456789",
+    password: "password",
     name: "Walter O'Brien"
 );
 ```