MediaCMS backend, initial commit

users/validators.py

@@ -0,0 +1,18 @@
+import re
+
+from django.core import validators
+from django.utils.deconstruct import deconstructible
+from django.utils.translation import gettext_lazy as _
+
+
+@deconstructible
+class ASCIIUsernameValidator(validators.RegexValidator):
+    regex = r"^[\w]+$"
+    message = _(
+        "Enter a valid username. This value may contain only "
+        "English letters and numbers"
+    )
+    flags = re.ASCII
+
+
+custom_username_validators = [ASCIIUsernameValidator()]