Upd

commands.py

@@ -198,7 +198,12 @@ async def make_message_shot(bot, message):
   await proc.communicate(input=data) 
 
   await remove(avatar_path)
- 
+
+  pproc = await create_subprocess_shell(
+    f'pngcrush -reduce -brute -ow {output_path} {output_path}'
+  )
+  await pproc.communicate()
+
   return output_path
 
 async def save_handler(bot, event, command):
@@ -222,7 +227,7 @@ async def save_handler(bot, event, command):
 
   try:
     file = await add_sticker(bot, path, emoji)
-    
+
     await bot.send_file(
       message.peer_id,
       file=file,
@@ -262,8 +267,15 @@ async def bday_handler(bot, event, command):
   birthdays = sorted(birthdays, key=lambda birthday: birthday[1].days_until)
 
   birthdays_list = ''
-  for user_id, age in birthdays:   
-    birthdays_list += get_user_name(await bot.get_entity(user_id))
+  for user_id, age in birthdays:
+    try:
+      entity = await bot.get_entity(user_id)
+    except ValueError:
+      birthdays_list += 'Ошибка!\n'
+
+      continue
+
+    birthdays_list += get_user_name(entity)
     birthdays_list += ' — '
     birthdays_list += age.date_string
     birthdays_list += f' (через {get_word_for("день", age.days_until)} исполнится {get_word_for("год", age.age)}; сейчас {get_word_for("год", age.age_now)})\n'