fix: public toggle issue,cloud function error handling

apps/OpenSignServer/cloud/parsefunction/GetPublicUserName.js

@@ -1,13 +1,23 @@
 async function GetPublicUserName(request) {
   try {
-    const username = request.params.username;
-    const userQuery = new Parse.Query('contracts_Users');
-    userQuery.equalTo('UserName', username);
-    const res = await userQuery.first({ useMasterKey: true });
-
-    return res;
+    if (!request?.user) {
+      throw new Parse.Error(Parse.Error.INVALID_SESSION_TOKEN, 'User is not authenticated.');
+    } else {
+      const username = request.params.username;
+      if (username) {
+        const userQuery = new Parse.Query('contracts_Users');
+        userQuery.equalTo('UserName', username);
+        const res = await userQuery.first({ useMasterKey: true });
+        return res;
+      } else {
+        throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'Please provide required parameters!');
+      }
+    }
   } catch (err) {
-    return err;
+    const code = err.code || 400;
+    const msg = err.message;
+    const error = new Parse.Error(code, msg);
+    throw error;
   }
 }
 export default GetPublicUserName;