Add missing unbind

.gitignore

@@ -1,3 +1,4 @@
 .env
 users.yaml
 build/
+coverage/

ldap.ts

@@ -49,6 +49,8 @@ export async function lookupUsernameByPubkey(pubkey: string): Promise<string | u
     if (searchEntries.length > 0) {
       username = searchEntries[0].cn.toString();
     }
+
+    await client.unbind();
   } catch (e) {
     await client.unbind();
     throw e;