auth-backend: fall back to username and id as displayName for profiles

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/auth-backend/src/lib/passport/PassportStrategyHelper.ts

@@ -30,8 +30,6 @@ export const makeProfileInfo = (
   profile: passport.Profile,
   idToken?: string,
 ): ProfileInfo => {
-  let { displayName } = profile;
-
   let email: string | undefined = undefined;
   if (profile.emails && profile.emails.length > 0) {
     const [firstEmail] = profile.emails;
@@ -44,6 +42,9 @@ export const makeProfileInfo = (
     picture = firstPhoto.value;
   }
 
+  let displayName: string | undefined =
+    profile.displayName ?? profile.username ?? profile.id;
+
   if ((!email || !picture || !displayName) && idToken) {
     try {
       const decoded: Record<string, string> = jwtDecoder(idToken);