Update user registration email format, remove unused SMS helper function, and adjust database migration for user meta column

app/Modules/OTPVerification/Repositories/OTPVerificationRepository.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Modules\OTPVerification\Repositories;
+
+use App\Modules\OTPVerification\Models\OTPVerification;
+use App\Modules\SMS\Repositories\SMSRepository;
+
+class OTPVerificationRepository
+{
+    /**
+     * Send a sms verification
+     */
+    public static function sendSMSVerification(string|int $phone_number): ?OTPVerification
+    {
+        /* for apple testing */
+        $phone_code = ($phone_number == '61126667') ? 77777 : rand(10000, 99999);
+
+        $verification = OTPVerification::where(['username' => $phone_number])->first();
+        $verification
+            ? $verification->update(['code' => $phone_code])
+            : OTPVerification::create(['username' => $phone_number, 'code' => $phone_code]);
+
+        SMSRepository::sendSMS($phone_number, 'Tassyklaýyş belgi: '.$phone_code);
+
+        return $verification;
+    }
+}