# Flow that allows for external login page

**URL:** <https://community.auth0.com/t/flow-that-allows-for-external-login-page/192164>\
**Category:** Get Help\
**Tags:** classic-universal-login-experience, login-experience\
**Created:** [September 19, 2025, 5:38pm UTC](https://community.auth0.com/t/flow-that-allows-for-external-login-page/192164 "2025-09-19T17:38:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jdrew1](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/jdrew1/32/61813_2.png) [@jdrew1](https://community.auth0.com/u/jdrew1)\
**Post date:** [September 19, 2025, 5:38pm UTC](https://community.auth0.com/t/flow-that-allows-for-external-login-page/192164/1 "2025-09-19T17:38:41Z")

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Hi-

I’ve inherited a legacy application that a I need to emulate. Here’s the gist of how it works

-User initiates login process

-Vendor (eg, Website) sends SAML request to IdP

-Idp redirects user to different third party Login interface (with custom data in a token to keep track of user)

-user logs in

-Third party service redirects user to back to IdP (with user id and authentication response)

-IdP service builds SAML response (using customer token to identify user).

-IdP returns user to ACS SAML response

-user is logged in

It’s essentially a typical login flow using a custom database EXCEPT instead of calling custom DB to authenticate users (via the Login action script), I need to route the user to the third party login interface, then be able to continue their request in auth0, after they are returned from the login interface.

I realize this isn’t best practice, but it’s what I need to do. Anybody know if this is workable on AuthO? Ideally, something like a pre-login action that allows a redirect and has a continue hook is what I’m looking for. Not sure that’s available…

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**Author:** ![dawid.matuszczyk](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dawid.matuszczyk/32/74550_2.png) [@dawid.matuszczyk](https://community.auth0.com/u/dawid.matuszczyk)\
**Post date:** [September 30, 2025, 11:58pm UTC](https://community.auth0.com/t/flow-that-allows-for-external-login-page/192164/3 "2025-09-30T23:58:17Z")

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Hi There!

Thank you for posting your question, and I appreciate your patience. I’m investigating this topic and will provide the answer as soon as possible.

Thanks!  
Dawid

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**Author:** ![jdrew1](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/jdrew1/32/61813_2.png) [@jdrew1](https://community.auth0.com/u/jdrew1)\
**Post date:** [October 1, 2025, 12:53pm UTC](https://community.auth0.com/t/flow-that-allows-for-external-login-page/192164/4 "2025-10-01T12:53:41Z")

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Thanks. Looking forward to your response.