30 characters user names is an outdated requirement (#8848)

django does not have this limitation anymore.

CHANGELOG.txt

@@ -96,6 +96,7 @@ Changelog
  * Fix: Make progress bars’ progress visible in forced colors mode (Anuja Verma)
  * Fix: Make checkboxes visible in forced colors mode (Anuja Verma)
  * Fix: Display the correct color for icons in forced colors mode (Anuja Verma)
+ * Fix: Remove outdated reference to 30-character limit on usernames in help text (minusf)
 
 
 3.0.1 (16.06.2022)

docs/releases/4.0.md

@@ -121,6 +121,7 @@ Wagtail’s page preview is now available in a side panel within the page editor
  * Make progress bars’ progress visible in forced colors mode (Anuja Verma)
  * Make checkboxes visible in forced colors mode (Anuja Verma)
  * Display the correct color for icons in forced colors mode (Anuja Verma)
+ * Remove outdated reference to 30-character limit on usernames in help text (minusf)
 
 
 ## Upgrade considerations

wagtail/users/forms.py

@@ -45,10 +45,7 @@ class UsernameForm(forms.ModelForm):
         if User.USERNAME_FIELD == "username":
             field = self.fields["username"]
             field.regex = r"^[\w.@+-]+$"
-            field.help_text = _(
-                "Required. 30 characters or fewer. Letters, "
-                "digits and @/./+/-/_ only."
-            )
+            field.help_text = _("Required. Letters, digits and @/./+/-/_ only.")
             field.error_messages = field.error_messages.copy()
             field.error_messages.update(
                 {