As the title says.

bot_in_a_guild() should also get imported from commands in checks to avoid breakage

General Troubleshooting

When your account has TFA enabled, discord needs you to supply a valid TFA token in order to change your account password. This could simply be done by a prompt if session.MFA is set to true.

For some odd reason when trying to get the vec of mention_channels from Message, it will return None if there is other text in the message. If there is no text in the message and only a channel mention, then it will return.