review and change from auto to needed type

src/users/delete_user.cpp

@@ -8,7 +8,7 @@ void delete_user(const httplib::Request& request, httplib::Response& response) {
     if (json_body["token"] == nullptr) {response.set_content("{\"required\":\"[token] or if you superuser [token,userid]\"}", "application/json");return;}
     if (!verify_auth(json_body["token"])) {response.set_content("{\"status\":\"403\"}", "application/json");return;}
 
-    auto decoded_token = jwt::decode(json_body["token"]);
+    jwt::decoded_jwt<jwt::traits::kazuho_picojson> decoded_token = jwt::decode(json_body["token"]);
     std::string userid = "";
     for (auto& e : decoded_token.get_payload_json()) {
         if (e.first == "userId") {
@@ -26,7 +26,7 @@ void delete_user(const httplib::Request& request, httplib::Response& response) {
     if (json_body["userid"] != nullptr) {
         deluserid = json_body["userid"];
         nlohmann::json response_user_data = nullptr;
-        for (auto& user : all_users) {
+        for (nlohmann::json& user : all_users) {
             if (user["id"] == userid) {
                 response_user_data = user;
             }