feat: expanded allowed characters in usernames to support accents (#2585)

src/core/common/helpers/validate.spec.ts

@@ -0,0 +1,20 @@
+import { USERNAME_REGEX } from "./validate";
+
+describe("USERNAME_REGEX", () => {
+  it("validates username characters", () => {
+    const usernames = [
+      "bill",
+      "bill.smith",
+      "bill_smith",
+      "bill.smith13",
+      "áki",
+      "åki.smith",
+      "åki.smith13",
+      "åki_smith",
+    ];
+
+    usernames.forEach(username => {
+      expect(USERNAME_REGEX.test(username)).toEqual(true);
+    });
+  });
+});

src/core/common/helpers/validate.ts

@@ -1,6 +1,6 @@
 import url from "url-regex";
 
-export const USERNAME_REGEX = new RegExp(/^[a-zA-Z0-9_.]+$/);
+export const USERNAME_REGEX = new RegExp(/^[a-zA-ZÀ-ÖØ-öø-ÿ0-9_.]+$/);
 export const USERNAME_MAX_LENGTH = 30;
 export const USERNAME_MIN_LENGTH = 3;