更新token解析

app/api/service/JwtTokenService.php

@@ -39,10 +39,10 @@ class JwtTokenService
         $time = time();
         $host = app('request')->host();
         $params += [
-            'iss' => $host,
-            'aud' => $host,
+            'iss' => $host, //签发者
+            'aud' => $host, //签发时间
             'iat' => $time,
-            'nbf' => $time,
+            'nbf' => $time, //生效时间
             'exp' => $time + 7 * 24 * 3600,
         ];
         $params['data'] = [