amazon ami error when IAM role is not configured correctly

when doing the install, postConfigure will fail at the add new instance with

When you run the command that fails manually, you get this error

aws: error: argument --key-name: expected one argument

• • • Failed to Launch an Instance for um1, will retry up to 5 times
    • Failed to Successfully Launch Instance for um1
      launch Instance failed for um1

[mariadb-user@ip-172-30-0-166 bin]$ ./MCSInstanceCmds.sh getKey

An error occurred (UnauthorizedOperation) when calling the DescribeInstances operation: You are not authorized to perform this operation.

So a change needs to be made to detect and report the 'UnauthorizedOperation' error