Minor changes

src/main.py

@@ -207,8 +207,14 @@ async def main(arguments: argparse.Namespace) -> int:
     if not arguments.tax_code:
         logger.info("You have not provided your tax/fiscal code, but I can get it for you. Please provide your GIA SSO"
                     " credentials below")
+        try:
             username = input("Type your GIA SSO username: ")
             password = getpass("Type your GIA SSO password (hidden): ")
+        except KeyboardInterrupt:
+            # Asyncio's signal handlers won't work
+            # when blocked in synchronous code like
+            # this
+            return
         logger.info(f"Logging in as {username!r}")
         if access_token := await login_with_gia(logger, username, password, arguments.verbose):
             logger.debug(f"Access token is {access_token!r}")
@@ -222,7 +228,7 @@ async def main(arguments: argparse.Namespace) -> int:
             return -1
     logger.info(f"Authenticating as '{arguments.tax_code}'")
     async with httpx.AsyncClient(
-        # We mimic the app's headers
+        # We mimic the app's headers. Specifically, this is my Xiaomi Mi 11i, lol
         headers={
             "User-Agent": "Dalvik/2.1.0 (Linux; U; Android 11; M2012K11G Build/RKQ1.201112.002)",
             # I seriously have no idea what the app designers were thinking, but
@@ -249,6 +255,7 @@ async def main(arguments: argparse.Namespace) -> int:
         ):
             return 1
         logger.debug(f"Request to {result.url} sent, status code is {result.status_code}")
+        try:
             if json.loads(result.text) != {}:
                 # The API returns an empty JSON object to unauthenticated
                 # requests
@@ -308,6 +315,8 @@ async def main(arguments: argparse.Namespace) -> int:
             else:
                 logger.error(f"The provided tax code does not appear to be valid, please check for any typos and try again")
                 return -1
+        except json.decoder.JSONDecodeError as json_error:
+            logger.error(f"A fatal JSON decoding error occurred -> {type(json_error).__name__}: {json_error}")
 
 
 if __name__ == "__main__":