add rahyab notification service

app/Models/User.php

@@ -34,6 +34,11 @@ class User extends Authenticatable
         return $this->belongsTo(MedicalCenter::class);
     }
 
+    public function getPhone()
+    {
+        return $this->cell_number;
+    }
+
     public function test_results(): HasMany
     {
         return $this->hasMany(TestResult::class);