Multiple calls to parameter store in single function #24

The msgFlagger function makes multiple calls to the AWS parameter store to retrieve the same information.

The first call during func getAdminChannel(string) (string, error):

The second call during func getUserName(string, string) (string, error):

As both of these are remote calls they incur unnecessary cost. An optimisation could be to make a single call and then pass the required values as parameters to these functions.