Enterprise Python Authentication

[zx]

Hello,

referring to this page https://developers.arcgis.com/python/guide/working-with-different-authentication-schemes/ , what is meant by "built-in identity provider" in this statement:

I'm trying to interact from python with feature layers that are stored on my enterprise account, we use OAuth2 with a IDP. I can't use the python API because I am not an administrator.. should I login with he REST API? 

[JoshuaBixby]

@zx, I moved your post from Python to ArcGIS API for Python because this involves the said API and not ArcPy.

[HariniS]

gis = GIS(ESRI_PORTAL_URL, api_key=ESRI_API_KEY)

gis =GIS(ESRI_PORTAL_URL, client_id=ESRI_CLIENT_ID)

gis = GIS(ESRI_PORTAL_URL, ESRI_USER, ESRI_PWD)

I have tried all these combinations and nothing seems to be working. 
Has anybody figured this out?
I am able to access the webmap with CRUD operations via REST API when the webmap is public , but when it is setup at the organization level , I cannot do those operations.