/// <summary>
 /// Delete entity from users
 /// </summary>
 /// <remarks>
 /// Represents an Azure Active Directory user object.
 /// </remarks>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='userId'>
 /// key: id of user
 /// </param>
 /// <param name='ifMatch'>
 /// ETag
 /// </param>
 public static void DeleteUser(this IUsersOperations operations, string userId, string ifMatch = default(string))
 {
     operations.DeleteUserAsync(userId, ifMatch).GetAwaiter().GetResult();
 }