Error in GetCredentials^OAUTH2.ZAUTHENTICATE.mac

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 '= "" {
...
}
```