Function ccash_rs::methods::admin::impact_balance

pub async fn impact_balance(
    session: &CCashSession, 
    admin_user: &CCashUser, 
    username: &str, 
    amount: i64
) -> Result<(), CCashError>

Impacts the balance of user with the given username by the amount described by amount. This function requires admin_user to be the admin account for the CCash instance.