code: public String serviceName_senders_POST(String serviceName, String description, String reason, String sender) throws IOException {
  		String qPath = "/sms/{serviceName}/senders";
  		StringBuilder sb = path(qPath, serviceName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "description", description);
  		addBody(o, "reason", reason);
  		addBody(o, "sender", sender);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, String.class);
  	}
docs: Create the sms sender given
  
  REST: POST /sms/{serviceName}/senders
  @param description [required] Sender description
  @param sender [required] The sender (alpha or phone number)
  @param reason [required] Message seen by the moderator
  @param serviceName [required] The internal name of your SMS offer