fix: cookie null 일때, 예외처리 (#89)

app-api/src/main/java/com/parkingcomestrue/parking/config/argumentresolver/AuthArgumentResolver.java

@@ -40,7 +40,7 @@ public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer m
     }
 
     private String getJsessionid(HttpServletRequest request) {
-        if (request == null) {
+        if (request == null || request.getCookies() == null) {
             return null;
         }
         for (Cookie cookie : request.getCookies()) {