# Populating both email and username from URL parameters?
**URL:** https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890
**Category:** Support
**Created:** [May 13, 2026, 4:34pm UTC](https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890 "2026-05-13T16:34:25Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@j127](https://meta.discourse.org/u/j127)
#### Post date: [May 13, 2026, 4:34pm UTC](https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890/1 "2026-05-13T16:34:25Z")
There’s a way to prepopulate the email address by linking to `forum.example.com/signup?email=alice@example.com`.
Is there a parameter to also pre-populate the username field? I want to prepopulate it with a random username to reduce sign-up friction. Users will still be able to change it before submitting if they want.
If there isn’t a built-in way, I’ll write a plugin.
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### Author:  [@Lilly](https://meta.discourse.org/u/Lilly)
#### Post date: [May 13, 2026, 4:43pm UTC](https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890/2 "2026-05-13T16:43:40Z")
there is an existing topic
> [@Populating email field on login page](https://meta.discourse.org/t/populating-email-field-on-login-page/357616):
>
> Hello, How can I send a login link to my users and make sure the email field is already populated ? Something like [www.my-discourse-site.com/login?email=person@gmail.com](http://www.my-discourse-site.com/login?email=person@gmail.com) So that this user gets his email ([person@gmail.com](mailto:person@gmail.com)) already filled in the login page when they click Thanks
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### Author:  [@j127](https://meta.discourse.org/u/j127)
#### Post date: [May 13, 2026, 5:55pm UTC](https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890/3 "2026-05-13T17:55:29Z")
Thanks, I don’t think that other topic is correct, because the feature exists for emails.
If you open this URL in an incognito window, it will fill the email but not the username:
- [https://meta.discourse.org/signup?email=user@example.com&username=nova\_tsunami\_fox\_1234](https://meta.discourse.org/signup?email=user@example.com&username=nova_tsunami_fox_1234)
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### Author:  [@RGJ](https://meta.discourse.org/u/RGJ)
#### Post date: [May 13, 2026, 9:39pm UTC](https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890/4 "2026-05-13T21:39:50Z")
> [@Lilly](#):
>
> there is an existing topic
That’s about the _login_ page. The `email=` parameter does work on the _signup_ page.
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### Author:  [@ted](https://meta.discourse.org/u/ted)
#### Post date: [May 18, 2026, 1:32am UTC](https://meta.discourse.org/t/populating-both-email-and-username-from-url-parameters/402890/5 "2026-05-18T01:32:16Z")
I checked. There isn’t any built-in way to do this right now. If you want to give it a try, the relevant flow for the e-mail is this:
[Rails controller sets cookie](https://github.com/discourse/discourse/blob/main/app/controllers/static_controller.rb#L131-L133)
→ [Ember router reads cookie and passes value to Ember controller](https://github.com/discourse/discourse/blob/main/frontend/discourse/app/routes/signup.js#L96-L98)
→ [Ember component accesses value on Ember controller](https://github.com/discourse/discourse/blob/main/frontend/discourse/app/templates/signup.gjs#L75)
Could also be worth checking with the team if they’d accept a PR for this, before making it a plugin.