fix: block usr_ signups

bin/mastodon-email-blocker.py

@@ -18,7 +18,7 @@ from pathlib import Path
 import dns.resolver
 
 
-VERSION = "6.5"
+VERSION = "6.6"
 
 SOURCES = [
     "https://raw.githubusercontent.com/mehrtat/disposable-email-domain/main/domains.txt",
@@ -429,7 +429,7 @@ User.pending.find_each(batch_size: 100) do |user|
       EmailDomainBlock.block?(user.email)
 
     blocked_username =
-      user.account.username.to_s.match?(/\\Ausr_/i)
+      user.account.username.to_s.match?(/\Ausr_/i)
 
     next unless blocked_email || blocked_username