func UserAddCmd(c *cli.Context, client drone.Client) error {
login := c.Args().Get(0)
if len(login) == 0 {
return fmt.Errorf("Missing or invalid user login")
}
user, err := client.UserPost(&drone.User{Login: login})
if err != nil {
return err
}
fmt.Printf("Successfully added user %s\n", user.Login)
return nil
}
