Most people planning to create a bot decide to make a new account to be their bot account.

Take note of the bot account's username and then submit a Pull Request to the Manifold repository on GitHub. The specific file to modify is common/src/envs/constants.ts and you will add the username of your bot to BOT_USERNAMES.

If your Pull Request does not get a response within a few days you can try to ping someone on staff, but Manifold has few employees and they aren't on call 24/7.