Switch validation function to static method

openlibrary/plugins/upstream/account.py

@@ -552,6 +552,7 @@ def GET(self):
 class account_validation(delegate.page):
     path = '/account/validate'
 
+    @staticmethod
     def ia_username_exists(username):
         url = "https://archive.org/metadata/@%s" % username
         try:
@@ -563,7 +564,7 @@ def ia_username_exists(username):
             return
 
     @staticmethod
-    def validate_username(self, username):
+    def validate_username(username):
         if not 3 <= len(username) <= 20:
             return _('Username must be between 3-20 characters')
         if not re.match('^[A-Za-z0-9-_]{3,20}$', username):
@@ -573,7 +574,7 @@ def validate_username(self, username):
         if ol_account:
             return _("Username unavailable")
 
-        ia_account = self.ia_username_exists(username)
+        ia_account = account_validation.ia_username_exists(username)
         if ia_account:
             return _("An Internet Archive account already exists with this username")