var refreshOptions = new MetadataRefreshOptions { Mode = MetadataRefreshMode.Periodic, Period = TimeSpan.FromMinutes(15) };
var refreshOptions = new MetadataRefreshOptions { Mode = MetadataRefreshMode.OnExpiry };
var refreshOptions = new MetadataRefreshOptions { Mode = MetadataRefreshMode.Never };This code sets `MetadataRefreshMode` to `Never`, which means the metadata will never be automatically refreshed. Package library: System.IdentityModel.Tokens.Jwt. This class is part of the System.IdentityModel.Tokens.Jwt library, which is used for creating and validating JSON Web Tokens (JWTs).