Added achievement data

app/Models/Airline.php

@@ -17,6 +17,7 @@ class Airline extends Model
         'name',
         'internal_name',
         'country_id',
+        'alliance_id',
         'active',
         'logo',
     ];
@@ -25,7 +26,6 @@ class Airline extends Model
         'active' => 'boolean',
     ];
 
-
     public $timestamps = false;
     protected $appends = [
         'display_name',
@@ -50,6 +50,11 @@ class Airline extends Model
         );
     }
 
+    public function alliance(): BelongsTo
+    {
+        return $this->belongsTo(Alliance::class);
+    }
+
     public function country(): BelongsTo
     {
         return $this->belongsTo(Country::class);