nOutput_AWSCloudWatch: Cannot find function trim in object

[nmaguiar]

Description
When trying to use nOutput_AWSCloudWatch in an AWS EC2 without an associated AWS IAM role the following error occurs:

Output AWS CloudWatch | TypeError: Cannot find function trim in object [object Object].

To Reproduce
Steps to reproduce the behavior:

1. Install nAttrMon on an AWS EC2
2. With a test nAttrMon input, configure a nAttrMon nOutput_AWSCloudWatch plug without any credentials (so it will default to AWS IMDS)
3. Start nAttrMon
4. The error will occur when trying to send the input metric to AWS CloudWatch

Expected behavior
It should error out indicating that the AWS EC2 IAM role was not found.

Additional context
The same applies on AWS EKS for it's AWS EC2 nodes which don't have a configured AWS IAM role.