Skip to content

Update instructions for programmatic username assignment and testing #1963

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
ttorble merged 1 commit into from
May 11, 2026
Merged

Update instructions for programmatic username assignment and testing #1963

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions docs/external-id/customers/how-to-sign-in-alias.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,9 @@ Also, if you configure a custom regex for both the sign-up attribute validation

Like other attributes, you can customize signup by pre-filling username or assigning it after gathering other user information. To prefill the value, use a custom extension with the [onAttributeCollectionStart](../../identity-platform/custom-extension-onattributecollectionstart-retrieve-return-data.md) event, and configure how it is presented via Page Layout or [via Microsoft Graph](how-to-define-custom-attributes.md#configure-attribute-visibility-and-editability-with-microsoft-graph). If you need to assign, modify, or validate the username after collecting more details, use the [onAttributeCollectionSubmit](../../identity-platform/custom-extension-onattributecollectionsubmit-retrieve-return-data.md) event.

> [!NOTE]
> If the username field is hidden from the user and the username value is assigned programmatically, make sure that the username value is unique or sign-up will be blocked.
Comment thread
v-dirichards marked this conversation as resolved.

## Test signing in with the alias or username

You can test signing up and signing in with the email address and username you assigned to the user you created using the [Run user flow](how-to-test-user-flows.md) feature. If you sign in with email address, you'll see email address in `preferred_username` claim. If you sign in with username, you'll see the username in `preferred_username` claim.
Expand Down