Profile: himanshuS

Problem:
The user would like to offer a questionnaire or poll for visitors and create a user afterward. This may involve the possibility to change the username at the end.

Solution:
WordPress does not have a supported way of changing the email and the username. Especially the username. For that matter, some plugins have filled this gap, such as:

• https://wordpress.org/plugins/username-updater/
• https://wordpress.org/plugins/wpvn-username-changer/
• https://wordpress.org/plugins/username/
• https://wordpress.org/plugins/username-editor/

Theoretically, we can change both on the database level, but that may create inconsistencies with WordPress's cache.

I would suggest to:

• Programmatically create a user to let the visitor go through the forms.
• Let the user complete the process steps.
• Then, create a new final user for the visitor, copy the posts or custom fields to it. Then, delete the old user.