Function db_core::tests::duplicate_username_and_email

pub async fn duplicate_username_and_email<T: LibAdminDatabase>(
    db: &T, 
    username: &str, 
    fresh_username: &str, 
    fresh_email: &str, 
    password: &str, 
    secret: &str, 
    duplicate_username: &str, 
    duplicate_email: &str
)

check if duplicate username and duplicate email guards are working on update workflows