Multiple calls to parameter store in single function

[billglover]

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):

bbot/cmd/msgFlagger/main.go

Lines 219 to 222 in a2f193b

	ar, err := secrets.GetTeamTokens(&db, t)
	if err != nil {
	return adminChan, errors.Wrap(err, "unable to fetch team tokens")
	}

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

bbot/cmd/msgFlagger/main.go

Lines 247 to 250 in a2f193b

	ar, err := secrets.GetTeamTokens(&db, t)
	if err != nil {
	return userName, errors.Wrap(err, "unable to fetch team tokens")
	}

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.