<PackageReference Include="System.ServiceModel.Primitives" Version="8.1.1" />

System.IdentityModel.Selectors.SecurityTokenAuthenticator

public abstract class SecurityTokenAuthenticator
namespace System.IdentityModel.Selectors { public abstract class SecurityTokenAuthenticator { protected SecurityTokenAuthenticator(); public bool CanValidateToken(SecurityToken token); public ReadOnlyCollection<IAuthorizationPolicy> ValidateToken(SecurityToken token); protected abstract bool CanValidateTokenCore(SecurityToken token); protected abstract ReadOnlyCollection<IAuthorizationPolicy> ValidateTokenCore(SecurityToken token); } }