Restrict Username, Name field for Joomla

By default, Joomla is pretty permissive with its usernames, allowing almost any character. However, for some reason, you don't want users on your website to use these characters. This plugin allows you to do this.

The plugin allows you to specify groups of characters that are not allowed in usernames and also min/max lengths for them. You can also apply these settings to the Name field.

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This plugin works well on Joomla 3 and 4. After downloading and installing it, go to Plugin Manager > User - JMP Restrict Username to get started:

Joomla Username Restriction config

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Paul K2 to Content Migration
Does this extension support migration of User Groups/Users and their related settings?

Thanks in advance.
yel Joomla Tiktok Embed plugin
After installing the plugin and following this article. https://joomhelper.com/embed-tiktok and your YouTube
tiktok still not showing. Where else do I have to check? (่joomla4)
Russell English K2 to Content Migration
I have migrated the K2 content over to Joomla content with no problems, but the K2 Extra Fields aren't being migrated over and any K2 Items which had extra field values set aren't being migrated as Joomla Custom fields. Have I done something wrong please?
Ulf Landén How to upload and attach files to Joomla articles
Hello - how can you get the attachment to open in a new window (_blank)?
yaniv rozenman K2 to Content Migration
Hi,
I've just installed the component to migrate K2 to articles on a very large site, and I have some problems:

I have 5000+ tags, and only 1400 were moved to Joomla tags.
What is the best practice for migrating the K2 items and saving the same IDs that I was using in the K2 items and categories if I already have articles and categories with the same IDs? Do I need to delete them before and check the box to "use the same K2 ID"?
The custom field type "select" doesn't seem to migrate correctly to Joomla fields. It adds the field but not with the correct type, and it fails to move the corresponding data to it.

Please let me know if you have any suggestions or solutions to these issues.
Thank you,