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Topic: Unable to create new user – Usernames can contain only letters, etc. · BuddyPress.org
Text Box Says This field can only contain letters
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1. Username: a. Type: text b. A username should only | Chegg.com
![Machine Name element description should allow for cases where machine name uses hyphens [#3052479] | Drupal.org](https://www.drupal.org/files/issues/2019-05-03/417EDA62-F895-4FD0-BFF2-0B707C4E42A5.jpg "Machine Name element description should allow for cases where machine name uses hyphens [#3052479] | Drupal.org")
Machine Name element description should allow for cases where machine name uses hyphens [#3052479] | Drupal.org
Registration form incorrectly indicates that "@" is allowed in username · Issue #1258 · MTG/freesound · GitHub
Mistake in help text - should be underscore NOT hyphens · Issue #20 · backdrop-contrib/fanciblock · GitHub
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1. Username: a. Type: text b. A username should only | Chegg.com
Username '' is invalid, can only contain letters or digits. Login. Identity. - Microsoft Q&A
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![500: [ { "validation": "regex", "code": "invalid_string", "message": "Username can only contain letters, numbers, and underscores", "path": [ "username" ] } ] | Mapmelon](https://www.mapmelon.com/img/error-melo.svg "500: [ { \"validation\": \"regex\", \"code\": \"invalid_string\", \"message\": \"Username can only contain letters, numbers, and underscores\", \"path\": [ \"username\" ] } ] | Mapmelon")
500: [ { "validation": "regex", "code": "invalid_string", "message": "Username can only contain letters, numbers, and underscores", "path": [ "username" ] } ] | Mapmelon
firebase realtime database - Invalid field name "Name ". Fields must contain only letters, numbers, and underscores, start with a letter or underscore, and be at most 128 char - Stack Overflow
Usernames can only include letter,numbers,dashes,underscores, and periods - YouTube
Username '' is invalid, can only contain letters or digits. Login. Identity. - Microsoft Q&A
How to Change TikTok Username: A Quick Guide
Mistake in help text - should be underscore NOT hyphens · Issue #20 · backdrop-contrib/fanciblock · GitHub
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