public RevokeTokenRequestHandler(
     IRevokeTokenValidator revokeTokenValidator,
     IGrantedTokenHelper grantedTokenHelper,
     IClientAuthenticationHelper clientAuthenticationHelper,
     ILogger <RevokeTokenRequestHandler> logger)
 {
     _revokeTokenValidator       = revokeTokenValidator;
     _grantedTokenHelper         = grantedTokenHelper;
     _clientAuthenticationHelper = clientAuthenticationHelper;
     _logger = logger;
 }