Override this view:

\views\default\page\elements\topbar.php

By deleting:

<?= elgg_view('core/account/login_dropdown') ?>

How are you trying to do it?

Code snippet please.

BTW, there's a plugin for redirects on your site

Sure, attached to this comment will be the code snippet that I am trying and the error I get. 

main.html: 

content.php: 

You cannot use elgg_register_action as it's.

Learn how to register action in Elgg.

So you should get a link to action that you can use in your code even if you use JS for this.

Learn how to use an action in JS.

You can try how it works between our apps:

Sign in PostWall then connect to eStore (you can delete accounts both after testing)

Hi Nikolai,

thanks for your reply,

my app already does authenticaiton, but it's basic database authentication.

I want elgg to generate a session without further authentication, trusting that i already have authenticated the user. is there a way to generate a session in the database or something of that sort?

The mentioned plugins do it. At least https://github.com/arckinteractive/elgg3_oauth_sso