bug: catch UserNameNotOccupiedErrors while rehydrating

[pekasen]

Traceback (most recent call last):
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/client/users.py", line 548, in _get_entity_from_string
    result = await self(
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/client/users.py", line 30, in __call__
    return await self._call(self._sender, request, ordered=ordered)
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/client/users.py", line 83, in _call
    result = await future
telethon.errors.rpcerrorlist.UsernameNotOccupiedError: The username is not in use by anyone else yet (caused by ResolveUsernameRequest)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/ec2-user/.local/bin/tegracli", line 8, in <module>
    sys.exit(cli())
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/click/decorators.py", line 26, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/tegracli/main.py", line 105, in hydrate
    client.loop.run_until_complete(
  File "/usr/lib64/python3.8/asyncio/base_events.py", line 616, in run_until_complete
    return future.result()
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/tegracli/dispatch.py", line 80, in dispatch_hydrate
    await dispatch_iter_messages(
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/tegracli/dispatch.py", line 34, in dispatch_iter_messages
    async for message in client.iter_messages(wait_time=10, **params):
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/requestiter.py", line 58, in __anext__
    if await self._init(**self.kwargs):
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/client/messages.py", line 289, in _init
    self._entity = (await self.client.get_input_entity(entity)) if entity else None
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/client/users.py", line 432, in get_input_entity
    await self._get_entity_from_string(peer))
  File "/home/ec2-user/.local/pipx/venvs/tegracli/lib64/python3.8/site-packages/telethon/client/users.py", line 551, in _get_entity_from_string
    raise ValueError('No user has "{}" as username'