<PackageReference Include="Microsoft.IdentityModel.Tokens" Version="8.19.1" />

Microsoft.IdentityModel.Tokens.IssuerSigningKeyResolver

public sealed delegate IssuerSigningKeyResolver : MulticastDelegate
Resolves the signing key used for validating a token's signature.
public IssuerSigningKeyResolver(object object, IntPtr method)

public virtual IAsyncResult BeginInvoke(string token, SecurityToken securityToken, string kid, TokenValidationParameters validationParameters, AsyncCallback callback, object object)

public virtual IEnumerable<SecurityKey> EndInvoke(IAsyncResult result)

public virtual IEnumerable<SecurityKey> Invoke(string token, SecurityToken securityToken, string kid, TokenValidationParameters validationParameters)