Missing readme and sensors not working

[eldi0s]

Hi, I would like to use your delta sensors but don't know how.

I tried to set it up like this:

  - platform: deltasolarcloud
    scan_interval: 300
    username: ""
    password: ""

but I'm only getting an error:

Error while setting up deltasolarcloud platform for sensor

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 289, in _async_setup_platform
    await asyncio.shield(task)
  File "/config/custom_components/deltasolarcloud/sensor.py", line 74, in async_setup_platform
    DeltaInverterSensor(coordinator, _name, values[1], values[2]) for _name, values in coordinator.data.items()
AttributeError: 'NoneType' object has no attribute 'items'

and

Error requesting deltasolar_cloud_sensor data: Expecting value: line 1 column 1 (char 0)