[wp-meta] [Making WordPress.org] #4382: Profile username validation on meetup application form

[Making WordPress.org]

#4382: Profile username validation on meetup application form
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 Reporter:  hlashbrooke                 |       Owner:  (none)
     Type:  enhancement                 |      Status:  assigned
 Priority:  normal                      |   Milestone:
Component:  WordCamp Site & Plugins     |  Resolution:
 Keywords:  needs-patch good-first-bug  |
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Comment (by RMarks):

 I ran into this a related problem today on the applicant's Slack username.
 At the very least, I'd like to suggest the username not have the @ symbol
 as a prefix.

 For the original scenaio that @hlashbrooke reported, would we just look
 for the HTTP response code after accessing the user's profile?  If it's a
 200, allow the form to be submitted.  If it's a 404, prevent the form from
 being submitted and show an message requesting they check their username
 or register for an account.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/4382#comment:2>
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