Display error if username is not valid

Author: ClementPasteau

newIDE/app/src/Profile/EditProfileDialog.js

@@ -31,6 +31,8 @@ export const getUsernameErrorText = (error: ?AuthError) => {
 
   if (error.code === 'auth/username-used')
     return 'This username is already used, please pick another one.';
+  if (error.code === 'auth/malformed-username')
+    return 'Please pick a short username with only alphanumeric characters as well as _ and -';
   return undefined;
 };
 

newIDE/app/src/Utils/GDevelopServices/Authentication.js

@@ -47,7 +47,8 @@ export type AuthError = {
     | 'auth/email-already-in-use'
     | 'auth/operation-not-allowed'
     | 'auth/weak-password'
-    | 'auth/username-used',
+    | 'auth/username-used'
+    | 'auth/malformed-username',
 };
 
 export default class Authentication {