public async Task AcceptInvitation([FromBody] string userId)
{
var currentUser = await _userService.GetUserByName(HttpContext.User.Identity.Name);
var user = await _userService.GetUserById(userId);
await _friendsInvitationService.AcceptInvitation(currentUser, user);
await _friendsService.CreateRelation(currentUser, user);
await _notificationService.CreateNotification("User " + currentUser.GetDisplayName() + " has accepted your friends request", NotificationType.InvitationAccepted, user, currentUser.Id.ToString());
await PushNumberOfNotifications(user);
}