Resolve "Bug: When creating an account with invalid characters the error is...

Resolve "Bug: When creating an account with invalid characters the error is "Username already taken" not "Invalid characters used""

app/assets/javascripts/pages/sessions/new/username_validator.js

@@ -62,13 +62,13 @@ export default class UsernameValidator {
       return this.setPendingState();
     }
 
-    if (!this.state.available) {
-      return this.setUnavailableState();
-    }
-
     if (!this.state.valid) {
       return this.setInvalidState();
     }
+
+    if (!this.state.available) {
+      return this.setUnavailableState();
+    }
   }
 
   interceptInvalid(event) {
@@ -89,7 +89,6 @@ export default class UsernameValidator {
 
   setAvailabilityState(usernameTaken) {
     if (usernameTaken) {
-      this.state.valid = false;
       this.state.available = false;
     } else {
       this.state.available = true;

changelogs/unreleased/45575-invalid-characters-signup.yml

+---
+title: 'Fix username validation order on signup, resolves #45575'
+merge_request: 19610
+author: Jan Beckmann
+type: fixed