Python social Auth (PSA) and Custom User Model. PSA does not identify custom user model

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Hi,

I am using custom user model with PSA. The problem is that the pipelines (and also some custom pipelines) do not run when I register custom user model however, they run perfectly while registering with Social sites like google and facebook.

I have defined SOCIAL_AUTH_USER_MODEL and added ModelBackend to AUTHENTICATION_BACKENDS.

Here is my custom user model https://dpaste.de/HCwj
and, my pipeline: https://dpaste.de/Um8a

I tried debugging the pipelines and it turns they pipeline does not even run when using custom user model

Can someone help on this please.