Memberpress Create transaction programatically.

gistfile1.txt

				$sub = new MeprSubscription();
				$sub->user_id = $user_ID;
				$sub->product_id = 123;
				$sub->price = 12.99;
				$sub->total = 12.99;
				$sub->period = 1;
				$sub->period_type = 'months';
				$sub->status = MeprSubscription::$active_str;
				$sub_id = $sub->store();

				$txn = new MeprTransaction();
				$txn->amount = 12.99;
				$txn->total = 12.99;
				$txn->user_id = $user_ID;
				$txn->product_id = 123;
				$txn->status = MeprTransaction::$complete_str;
				$txn->txn_type = MeprTransaction::$payment_str;
				$txn->gateway = 'manual';
				$txn->expires_at = gmdate('Y-m-d 23:59:59', (time() + MeprUtils::months(1)));
				$txn->subscription_id = $sub_id;
				$txn->store();