package models import ( "time" ) // each session contains the username of the user and the time at which it expires type Session struct { Username string Expiry time.Time } // we'll use this method later to determine if the session has expired func (s Session) IsExpired() bool { return s.Expiry.Before(time.Now()) } func ListUsernames(ss map[string]*Session) []string { resp := make([]string, 0, len(ss)) for _, s := range ss { resp = append(resp, s.Username) } return resp }