fix: added check if token is none in export method

exportchannels/exportchannels.py

@@ -14,9 +14,13 @@ class ExportChannels(commands.Cog):
             bot_token = None
         )
 
+    class ConfigException(Exception):
+        pass
 
     async def export(self, channels: list):
         token = await self.config.bot_token()
+        if token is None:
+            raise(self.ConfigException, "Bot token not set!")
         self.data_path = data_manager.cog_data_path(self)
         self.bundled_data_path = data_manager.bundled_data_path(self)
         out = f'{self.data_path}{os.sep}Exported Channels'