You have not used this connection string, only part of it, can you try that? ( you can find it in the first challenge : install and set up mongoose.) The callback is optional, I don’t remember where I found that code, it might show you what’s going on.
Apologies for writing myself and all those other people into your database, I’m currently learning about internet security and you had offered sensitive details about your connection, so I gave it a shot. Your connection string is this:
Insert <yourUserName>, <yourPassword> and <yourDBname>.
Your create() function is fine, you only had the wrong connection string.
Also, never share the content of your .env file unless you’re in a learning environment like FCC (plus, never use that database again for real projects).