improvement: error handling on contact creation

backend/src/services/WbotServices/CheckIsValidContact.ts

@@ -10,10 +10,13 @@ const CheckIsValidContact = async (number: string): Promise<void> => {
   try {
     const isValidNumber = await wbot.isRegisteredUser(`${number}@c.us`);
     if (!isValidNumber) {
-      throw new AppError("The suplied number is not a valid Whatsapp number");
+      throw new AppError("invalidNumber");
     }
   } catch (err) {
     console.log(err);
+    if (err.message === "invalidNumber") {
+      throw new AppError("This is not a valid whatsapp number.");
+    }
     throw new AppError(
       "Could not valid WhatsApp contact. Check connections page"
     );