[wp-trac] [WordPress Trac] #41672: REST create user: existing_user_login is returned before existing_user_email

[WordPress Trac]

#41672: REST create user: existing_user_login is returned before
existing_user_email
-------------------------+-----------------------------
 Reporter:  bbrian       |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  General      |    Version:  4.8.1
 Severity:  normal       |   Keywords:
  Focuses:               |
-------------------------+-----------------------------
 When I post to `/wp-json/wp/v2/users` to create a user:
 {{{
 {
         "email": "brianhenryie at gmail.com",
         "username": "brianhenryie",
         "password": "password"
 }
 }}}
 and a user with that username and email address exists, the response is:
 {{{
 {
     "code": "existing_user_login",
     "message": "Sorry, that username already exists!",
     "data": null
 }
 }}}
 whereas a more useful response would be the existing_user_email response:
 {{{
 {
     "code": "existing_user_email",
     "message": "Sorry, that email address is already used!",
     "data": null
 }
 }}}
 which is learned once the original POST is updated with a new username.

 i.e. existing_user_email tells a user if they already have an account.
 This information could be used to attempt to log in.

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Ticket URL: <https://core.trac.wordpress.org/ticket/41672>
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