ADAL within a Datasource Plugin

Is it possible for the url to be dynamic from configuration? It doesn’t appear to be working.

“routes”: [{
“path”: “mycustompath”,
“method”: “GET”,
“url”: “https://{{ .JsonData.customUrl }}”,
“tokenAuth”: {
“url”: “https://login.windows.net/{{ .JsonData.tenant }}/oauth2/token”,
“params”: {
“grant_type”: “client_credentials”,
“client_id”: “{{ .JsonData.applicationid }}”,
“client_secret”: “{{ .JsonData.applicationkey }}”,
“resource”: “{{ .JsonData.resource }}”
}
}