/// <summary>
/// Register request
/// </summary>
/// <param name="username">Username property</param>
/// <param name="firstname">Firstname property</param>
/// <param name="lastname">Lastname property</param>
/// <param name="email">Email property</param>
/// <param name="password">Password property</param>
/// <returns>Task</returns>
public virtual async Task Register(string username, string firstname, string lastname, string email, string password)
{
await _client.Register(username, firstname, lastname, email, password);
}
