It is possible to leave this section empty. However, in order to receive notifications from the bot, such as "@user played https://youtu.be/videoId", it is necessary to authorize your account or your bot's account on http://twitchapps.com/tmi/. Once the authorization process is complete, please copy and paste the code provided below.
If you choose not to assign a specific replier, the app will automatically utilize the default replier. If you encounter an issue where the default replier fails to respond, it is possible that a setting such as "only verified phone numbers can chat" is enabled. In such an event, kindly enter the command to your chat /mod secretary_ganyu
Example code
oauth:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx