Identify Anonymous Snapchat User

I need assistance in uncovering the identity of a specific user on Snapchat. Currently, I only have their username and no additional information. I've not attempted any methods to identify this person yet. This is a new undercover username. They know who I am but I’m not sure who it is. It’s a friend though

Ideal Skills and Experience:
- Proficient in social media investigations
- Strong analytical skills
- Discreet and trustworthy
- Excellent communication能力