Error in GetCredentials^OAUTH2.ZAUTHENTICATE.mac

[george-james-software]

If I had a dollar for every time someone forgets the ,1) on %request.Data(...

This line:
if ServiceName="%Service_WebGateway",$data(%request.Data(##class(%OAuth2.Login).#SessionQueryParameter),state) {
Should be something like:

if ServiceName="%Service_WebGateway" {
  set sessionQueryParameter = ##class(%OAuth2.Login).#SessionQueryParameter
  set state = $get(%request.Data(sessionQueryParameter,1))
  if state '= "" {
       ...
  }