code: public boolean kickChatMember(String chatId, int userId) {
  
          HttpResponse<String> response;
          JSONObject jsonResponse;
  
          try {
              MultipartBody request = Unirest.post(getBotAPIUrl() + "kickChatMember")
                      .field("chat_id", chatId, "application/json; charset=utf8;")
                      .field("user_id", userId);
  
              response = request.asString();
              jsonResponse = Utils.processResponse(response);
  
              if(jsonResponse != null) {
  
                  if(jsonResponse.getBoolean("result")) return true;
              }
          } catch (UnirestException e) {
              e.printStackTrace();
          }
  
          return false;
      }
docs: Use this method to kick a user from a group or a supergroup. In the case of supergroups, the user will not be
  able to return to the group on their own using invite links, etc., unless unbanned first. The bot must be
  an administrator in the group for this to work
  
  @param chatId    The ID of the chat that you want to kick the user from
  @param userId    The ID of the user that you want to kick from the chat
  
  @return True if the user was kicked successfully, otherwise False