ASP.NET Core has a great feature to store user settings securely.
It works great on OSX (and Linux, Windows), stores data in JSON:
~/.microsoft/usersecrets/<userSecretsId>/secrets.json
Is it working in the cloud (Cloud Foundry) too? If yes, then were are the values stored?
Secrets exists for safe storage during development by helping prevent sensitive data from being storing in code / checked into source control.
The Secret Manager tool does not encrypt the stored secrets and should not be treated as a trusted store. It is for development purposes only. The keys and values are stored in a JSON configuration file in the user profile directory.
In Cloud you can directly use Environment Variables for that.
来源：https://stackoverflow.com/questions/39743972/how-do-usersecrets-work-in-the-cloud