feat: support for oauth token pathcing

Upon the change in the username of an account

src/appier_extras/parts/admin/models/account.py

@@ -964,9 +964,23 @@ def fix_children_s(self):
         level = 2
     )
     def change_username_s(self, username):
+        # retrieves the global reference to the account class so that
+        # it can be used for the triggering of global operations
+        cls = self.__class__
+
+        # saves the previous username value as it's going to be used
+        # in the event payload once there's a trigger operation
+        username_p = self.username
+
+        # updates the account's username and then saves the instance
+        # so that it reflects the new username
         self.username = username
         self.save()
 
+        # triggers the event that indicates the change in the username
+        # so that any listener can act on it
+        cls.trigger_g("change_username", self, username_p)
+
     @appier.operation(
         name = "Change Email",
         description = """Changing the email of an account is

src/appier_extras/parts/admin/part.py

@@ -192,10 +192,12 @@ def load(self):
         self.load_operations()
 
         self.account_c.bind_g("touch_login", self._on_touch_login)
+        self.account_c.bind_g("change_username", self._on_change_username)
 
     def unload(self):
         appier.Part.unload(self)
 
+        self.account_c.unbind_g("change_username", self._on_change_username)
         self.account_c.unbind_g("touch_login", self._on_touch_login)
 
         self.unload_operations()
@@ -2689,6 +2691,12 @@ def _on_touch_login(self, account):
         self._login_count += 1
         self.flush_settings()
 
+    def _on_change_username(self, account, username):
+        oauth_tokens = models.OAuthToken.find(username = username, limit = 0)
+        for oauth_token in oauth_tokens:
+            oauth_token.username = account.username
+            oauth_token.save()
+
     @property
     def _last_login_s(self, format = "%Y-%m-%d %H:%M:%S UTC"):
         if not self._last_login: return None