researchguru wrote: …

auto login should be like this: example.com/index.php/admin/authenticati...=admin&password=1234 , which does not work for me.

A permanent link for auto login by email :blink:

Since email are not secure by default : it's a serious security issue.

Else : all can be done with plugin : see gitlab.com/SondagesPro/coreAndTools/linkPasswordUser sample for 2.6lts