Address PR feedback

Author: S-Saranya1

core/auth/src/main/java/software/amazon/awssdk/auth/credentials/InstanceProfileCredentialsProvider.java

@@ -215,8 +215,12 @@ private RefreshResult<AwsCredentials> refreshCredentials() {
                         return refreshCredentials();
                     }
                 } else {
+                    String profileName = resolveProfileName();
                     throw SdkClientException.builder()
-                                           .message("Invalid profile name")
+                                           .message(String.format("Invalid EC2 instance profile name: '%s'. " +
+                                                                 "Verify that the profile exists and that your instance " +
+                                                                 "has permission to access it. ",
+                                                                 profileName))
                                            .cause(e)
                                            .build();
                 }

core/auth/src/test/java/software/amazon/awssdk/auth/credentials/InstanceProfileCredentialsProviderExtendedApiTest.java

@@ -271,7 +271,7 @@ void resolveCredentials_withInvalidProfileName_throwsError() {
 
         assertThatThrownBy(() -> provider.resolveCredentials())
             .isInstanceOf(SdkClientException.class)
-            .hasMessageContaining("Invalid profile name");
+            .hasMessageContaining("Invalid EC2 instance profile name");
 
         verify(putRequestedFor(urlPathEqualTo(TOKEN_RESOURCE_PATH))
                    .withHeader(EC2_METADATA_TOKEN_TTL_HEADER, equalTo("21600")));
@@ -383,7 +383,7 @@ void resolveCredentials_withInvalidProfileNameAgainstLegacyApi_throwsError() {
 
         assertThatThrownBy(() -> provider.resolveCredentials())
             .isInstanceOf(SdkClientException.class)
-            .hasMessageContaining("Invalid profile name");
+            .hasMessageContaining("Invalid EC2 instance profile name");
 
         verify(putRequestedFor(urlPathEqualTo(TOKEN_RESOURCE_PATH))
                    .withHeader(EC2_METADATA_TOKEN_TTL_HEADER, equalTo("21600")));