private async Task AddHeaders(HttpRequestMessage request, string userId, CancellationToken cancellationToken)
{
log.LogInformation("Obtaining new access token for {resource}", fhirUrl);
var accessToken = await managedIdentity.FetchToken(fhirUrl, cancellationToken);
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/fhir+json"));
request.Headers.Add("X-MS-AZUREFHIR-AUDIT-USERID", userId);
}
