TypeError: get_wsgi_app() takes no arguments (2 given)

Tried running gunicorn command gunicorn -b 0.0.0.0:8080 app:get_wsgi_app
Got this error.
noc@linux-test:/opt/oncall/build/lib.linux-x86_64-2.7/oncall$ gunicorn -b 0.0.0.0:8080 app:get_wsgi_app [2018-08-29 21:52:30 +0000] [2064] [INFO] Starting gunicorn 19.7.1 [2018-08-29 21:52:30 +0000] [2064] [INFO] Listening at: http://0.0.0.0:8080 (2064) [2018-08-29 21:52:30 +0000] [2064] [INFO] Using worker: sync [2018-08-29 21:52:30 +0000] [2068] [INFO] Booting worker with pid: 2068 [2018-08-29 21:52:54 +0000] [2068] [ERROR] Error handling request / Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/gunicorn-19.7.1-py2.7.egg/gunicorn/workers/sync.py", line 135, in handle self.handle_request(listener, req, client, addr) File "/usr/local/lib/python2.7/dist-packages/gunicorn-19.7.1-py2.7.egg/gunicorn/workers/sync.py", line 176, in handle_request respiter = self.wsgi(environ, resp.start_response) TypeError: get_wsgi_app() takes no arguments (2 given) [2018-08-29 21:52:54 +0000] [2068] [ERROR] Error handling request /favicon.ico Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/gunicorn-19.7.1-py2.7.egg/gunicorn/workers/sync.py", line 135, in handle self.handle_request(listener, req, client, addr) File "/usr/local/lib/python2.7/dist-packages/gunicorn-19.7.1-py2.7.egg/gunicorn/workers/sync.py", line 176, in handle_request respiter = self.wsgi(environ, resp.start_response)
Is there any documentation on how to roll out this tool in production environment?

Start with the reported Gunicorn entry point, app:get_wsgi_app, and the shown command and traceback. Check the project's existing deployment documentation and determine what production rollout steps and WSGI invocation should be documented; done means a newcomer can follow the documented setup without triggering the reported TypeError.