How to add the 'Switch User' block on Drupal 8 ?
How to active Drupal Devel's Switch user Block ?
How to login as another user without entering username and password ?
Drupal 8 Devel module has an integrated switch user block. This function allow you to switch users without logout/login (for the selected roles) and without entering user name and password. To activate a this block.
- Enable Drupal 8 'Devel' Module (/admin/modules)
- Add the block 'Switch user' (Catagory:Forms) into a region you want, from
'/admin/structure/block' -> 'Place block'
- Configure number of users you want to show, Allow entering any user name ...
- By default Only the 'ADMINISTRATOR' role can use this function, but you can change it on permissions page (/admin/people/permissions).
CAUTION : do not allow this to anybody, because they can take your site's full control.
Note : This function is very similar to the 'Masquerade' module but lightweight.