Azure Instance Metadata Service endpoints "/oauth2/token"
Box 1:
http://169.254.169.254/metadata/identity/oauth2/token
Sample request using the Azure Instance Metadata Service (IMDS) endpoint (recommended):
GET 'http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https://management.azure.com/' HTTP/1.1 Metadata: true
Box 2: JsonConvert.DeserializeObject<Dictionary<string,string>>(payload);
Deserialized token response; returning access code.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/managed-identities-azure-resources/how-to-use-vm-token
https://docs.microsoft.com/en-us/azure/service-fabric/how-to-managed-identity-service-fabric-app-code