Fix variable in error log (#481)

Fixes #480

smletsExchangeConnector.ps1

@@ -4935,7 +4935,7 @@ else
         #validate the Run As Account format to ensure it is an email address
         if (!(($username + "@" + $domain) -match "^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$"))
         {
-            New-SMEXCOEvent -Source "General" -EventId 4 -LogMessage "The address/SCSM Run As Account used to sign into 365 is not a valid email address and is currently entered as $($username + "@" + $password). This will prevent a successful connection. To fix this, go to the Run As account in SCSM and for the username enter it as an email address like user@domain.tld" -Severity "Error"
+            New-SMEXCOEvent -Source "General" -EventId 4 -LogMessage "The address/SCSM Run As Account used to sign into 365 is not a valid email address and is currently entered as $($username + "@" + $domain). This will prevent a successful connection. To fix this, go to the Run As account in SCSM and for the username enter it as an email address like user@domain.tld" -Severity "Error"
         }
         #request an access token from Azure
         $ReqTokenBody = @{