C# Asynchronous Method to Check Username Availability

The code provided is an asynchronous method called "UserNameInfo" that takes a "username" parameter and returns a "bool" value.

Inside the method, it uses the "_user" object to find all users that have the same username as the one passed as a parameter. This operation is awaited, meaning it will not block the execution of the method while waiting for the result.

If the count of found users is 0, meaning no users have the same username, the method returns "true". Otherwise, it returns "false".

Overall, this method is used to check if a given username is already taken by any existing users.