Storing sensitive data like API keys, database connection strings, or passwords directly in your code or appsettings.json is a major security risk. If you accidentally commit these files to source control (like GitHub ), anyone with access to the repository can see them.
In ASP.NET Core, WebApplication.CreateBuilder automatically includes the user secrets configuration source when the environment is set to . You can access these secrets using the standard Configuration API or the Options Pattern . Using IConfiguration: How to manage user secrets in ASP.NET Core
Take advantage of user secrets management in ASP.NET Core to prevent the sharing of sensitive application data in your projects. . EP 36 : How to manage User Secrets in ASP.NET Core Web API Storing sensitive data like API keys, database connection