New answers tagged username
WordPress does not allow this "configuration". And I seriously doubt you would have any luck writing a plugin that would take care of this in a complete way. The WPDB class is heavily utilized throughout the site, and sifting through read-only vs write-enabled uses would be daunting.
If you have server access you can install http://wp-cli.org/ and fiddle around with wordpress without creating a user.
Based on the latest details from Mario, this is meant as a back door and from his original question, the username and password would be encoded in the php file. Hard coded backdoors are big issues from a security perspective and should not be used. Passwords should be stored in encrypted databases so that they can be changed. The other concern I have with ...
Sounds like you're trying to build a back door into WordPress from a plugin. You can't circumvent the login like this otherwise everyone would be able to release a plugin and do it.
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