Unable to automate scan with Nessus 7 professional - rest

Question

I am evaluating the product Nessus 7 to perform vulnerability scans on the systems in my network.I am able to perform the scans successfully, but I am unable to automate it with a python Nessrest client. The following error is thrown by the nessrest client. Please help me out with this issue. Thank you.
No Title
*****************START ERROR*****************
JSON :
{"uuid": "ab4bacd2-05f6-425c-9d79-3ba3940ad1c24e51e1f403febe40",
"settings": {"text_targets": "targetIp", "file_targets": "",
"folder_id": 82, "description": "Created with REST API", "filters": [],
"launch": "ON_DEMAND", "scanner_id": "1", "emails": "", "filter_type": "",
"name": ""}}
{}
HEADERS :
{'X-Cookie': 'token=1c1c4f11e325eb19440feaaf04706d1265f347d105a06f44',
'Content-type': 'application/json', 'Accept': 'text/plain'}
URL : https://ipaddress:8834/scans
METHOD : POST
RESPONSE: 412
{
"error": "API is not available"
}
******************END ERROR******************
Traceback (most recent call last):
File "nessrest.py", line 1, in <module>
import nessrest
File "C:\Users\ballalc\nessrest.py", line 8, in <module>
scan.scan_add(targets="ipaddress")
File "C:\Users\ballalc\ness6rest.py", line 705, in scan_add
self.scan_uuid = self.res["scan"]["uuid"]
KeyError: 'scan'

Answer 1

Nessus has stopped implicit API Support from 7.x. You should either be using their Free Version "Nessus Home" or licensed to "SecurityCenter or Tenable.io" to use API for automation.
If you were an existing licensee, you can still use API until December, 2018 provided you don't update to Nessus Pro v7
Nessus Update ScreenShot

Answer 2

I know you are willing to see copy/past solution here, but not that easy just read till the end.
Also suffer for API removal, but finally developed a small java workaround class to handle all the automation and bypass Nessus API restrictions. Do not want to publish it since if they see will block it as well. They no longer want people to use Nessus and actively forcing everyone to switch to tenable.io
I can send it to anyone personally or if needed explain how it's work.