/// <summary>
/// Deletes a user.
/// </summary>
/// <param name="userId">The user identifier.</param>
/// <returns>A void task.</returns>
public async Task DeleteUser(int userId)
{
var exitingUser = await _userData.GetAsync <User>(userId);
if (exitingUser == null)
{
throw new InvalidOperationException("User does not exist.");
}
await _userData.DeleteAsync(exitingUser);
_adminLogService.LogNeutral($"User account deletion for {exitingUser.UserName} succeeded.", LogCategory.Security);
}