made some minor updates

Author: scmacdon

kotlin/services/ecr/src/main/kotlin/com/example/ecr/scenario/ECRScenario.kt

@@ -40,14 +40,14 @@ suspend fun main(args: Array<String>) {
         
         """.trimIndent()
 
-    // if (args.size != 2) {
-    //     println(usage)
-    //     return
-    // }
+     if (args.size != 2) {
+        println(usage)
+         return
+     }
 
-    var iamRole = "arn:aws:iam::814548047983:role/Admin"
+    var iamRole = args[0]
     var localImageName: String
-    var accountId = "814548047983"
+    var accountId = args[1]
     val ecrActions = ECRActions()
     val scanner = Scanner(System.`in`)