Add people to "User Blocklist" without pinging them

What new feature would you like to see?

Pinging requires the person to be in the server. Doing <@123456789123456789> with the user ID does result in a "ping" but the bot spits out an error message in this case

[ERROR:bot] Exception in on_message
Traceback (most recent call last):
  File "/root/MusicBot/musicbot/bot.py", line 6869, in on_message
    response = await handler(**handler_kwargs)
  File "/root/MusicBot/musicbot/bot.py", line 2691, in cmd_blockuser
    if option in ["+", "add"] and self.config.user_blocklist.is_blocked(user):
  File "/root/MusicBot/musicbot/config.py", line 1974, in is_blocked
    user_id = str(user.id)
AttributeError: 'NoneType' object has no attribute 'id'

I haven't tested if this error persists if you do the <@id> trick in a channel that a user does not have access to, but they're a member of the server otherwise.

It would be nice if we were able to do this without pinging people. Either with just usernames (e.g. !blockuser + user_name123) or user IDs (!blockuser + 123456789123456789). Not to mention, not pinging people is far less confrontational.

I will also say it would be nice if there was a way for certain users (with perms) to check the block list. Currently there's no way for a non-host user to know what the block list looks like. At the very least it would be cool if doing !blockuser [user] (without +/-) would tell if you that user was blocked or not.

Which of these categories fit your request?

None

Just checking...

[X] I have confirmed that my feature has not already been requested.
[X] I have confirmed that my feature has not already been implemented in the review branch.

Just-Some-Bots / MusicBot