refactor(usermanagement): tidy up User model code structure and improve attribute casting

app/Models/User.php

@@ -7,6 +7,7 @@
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Modules\Basicdata\Models\Branch;
+use Modules\Adk\Models\Appointment;
 use Spatie\Permission\Traits\HasRoles;
 use Mattiverse\Userstamps\Traits\Userstamps;
 
@@ -68,8 +69,7 @@
      *
      * @return array<string, string>
      */
-        protected function casts()
+    protected function casts(): array
-        : array
     {
         return [
             'email_verified_at' => 'datetime',
@@ -78,7 +78,8 @@
         ];
     }
 
-        public function branch(){
+    public function branch()
+    {
         return $this->belongsTo(Branch::class);
     }
 
@@ -91,4 +92,14 @@
     {
         return \Modules\Usermanagement\Database\Factories\UserFactory::new();
     }
+
+    /**
+     * Get all of the appointments for the User
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function appointments()
+    {
+        return $this->hasMany(Appointment::class, 'admin_id');
+    }
 }