$auth.validateUser undefined in safari.

[91sticker]

I am facing an issue where I have implemented SAML authentication in my rails api having angular front end.
The SAML authentication works just fine in chrome and firefox but on safari $auth.validateUser returns undefined. And that only is the scenario in production servers. On development environment and staging server it works fine on safari as well.

I have checked Safari settings, I have checked my SAML IDP's logs.
I have inspected the sever logs for both chrome and safari auth processes in both scenarios when I receive the response from my IDP I parse and sign user in on my API (using devise token auth) and then send response to front-end

Redirected to http://myapp/#/login?auth_token=********&client_id=**********&config=&expiry=************&uid=***************

Its been days and I haven't come anywhere closer to fixing this issue. Any help would be massively appreciated.

[91sticker]

If anyone else face a similar issue.
I found a fix on this particular link. This is what worked for me. I thought I would share.