I also use the integration of Airconwithme/Intesishome.
Just follow the instructions in the integration. Your unit must me linked to your Airconwithme or Intesishome account, before you will see any entities in Home assistant.
One important thing you have to take in account is that your Wifi module can be linked with Intesishome OR with Airconwithme. It depends on the card you ordered. If it is Intesishome, the example in the integration works like a charm. If you have Airconwithme, don’t forget to supply device: airconwithme in your configuration, otherwise it will use the default which is intesishome.
My configuration is as follows:
climate:
- platform: intesishome
device: airconwithme
username: USERNAME
password: PASSWORD