Finish preliminary v2 audit logs

backend/src/variables/authentication.ts

@@ -1,4 +1,5 @@
-export const AUTH_MODE_JWT = "jwt";
-export const AUTH_MODE_SERVICE_ACCOUNT = "serviceAccount";
-export const AUTH_MODE_SERVICE_TOKEN = "serviceToken";
-export const AUTH_MODE_API_KEY = "apiKey"; // TODO: deprecate
+export enum AuthMode {
+    JWT = "jwt",
+    SERVICE_TOKEN = "serviceToken",
+    API_KEY = "apiKey"
+}