[wp-trac] [WordPress Trac] #27317: Update wp_insert_user function to return 'pre_user_login' filter WP_Errors

[WordPress Trac]

#27317: Update wp_insert_user function to return 'pre_user_login' filter WP_Errors
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 Reporter:  crazycoolcam             |       Owner:  SergeyBiryukov
     Type:  enhancement              |      Status:  assigned
 Priority:  normal                   |   Milestone:  4.4
Component:  Users                    |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  2nd-opinion needs-patch  |     Focuses:
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Comment (by markjaquith):

 So, on multisite, usernames are rejected with uppercase characters.

 So on multisite, those usernames will be rejected with another error code.
 @boonebgorges suggested we collapse down onto `invalid_username` which
 already exists.

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Ticket URL: <https://core.trac.wordpress.org/ticket/27317#comment:28>
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