stages/user_login: stay logged in (#4958)

* add initial remember me offset

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add to go executor

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add ui for user login stage

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* update docs

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

website/docs/flow/index.md

@@ -36,7 +36,7 @@ Flows are designated for a single purpose. This designation changes when a flow
 
 This is designates a flow to be used for authentication.
 
-The authentication flow should always contain a [**User Login**](stages/user_login.md) stage, which attaches the staged user to the current session.
+The authentication flow should always contain a [**User Login**](stages/user_login/index.md) stage, which attaches the staged user to the current session.
 
 #### Invalidation
 

website/docs/flow/stages/user_login/index.md

@@ -26,6 +26,12 @@ You can set the session to expire after any duration using the syntax of `hours=
 
 All values accept floating-point values.
 
+## Stay signed in offset
+
+When this is set to a higher value than the default _seconds=0_, a prompt is shown, allowing the users to choose if their session should be extended or not. The same syntax as for _Session duration_ applies.
+
+![](./stay_signed_in.png)
+
 ## Terminate other sessions
 
 When enabled, previous sessions of the user logging in will be revoked. This has no affect on OAuth refresh tokens.

website/docs/flow/stages/user_logout.md

@@ -2,4 +2,4 @@
 title: User logout stage
 ---
 
-Opposite stage of [User Login Stages](user_login.md). It removes the user from the current session.
+Opposite stage of [User Login Stages](user_login/index.md). It removes the user from the current session.