private async Task <string> AcquireAcrAccessToken(string scope, string acrServer, string azureAccessToken)
{
var acrRefreshToken = await _portalService.GetAcrRefreshToken(
Configuration.Azure.TenantId,
acrServer,
azureAccessToken);
var acrAccessToken = await _portalService.GetAcrAccessToken(
acrServer,
scope,
acrRefreshToken.Result);
return(acrAccessToken.Result);
}