code: async def get_input_chat(self):
          
          if self.input_chat is None and self.chat_id:
              try:
                  # The chat may be recent, look in dialogs
                  target = self.chat_id
                  async for d in self._client.iter_dialogs(100):
                      if d.id == target:
                          self._chat = d.entity
                          self._input_chat = d.input_entity
                          break
              except errors.RPCError:
                  pass
  
          return self._input_chat
docs: Returns `input_chat`, but will make an API call to find the
          input chat unless it's already cached.