增加agent模型关联

app/Models/User.php

@@ -8,4 +8,9 @@ class User extends BaseModel
 {
     use HasFactory;
 	protected $guarded = ['id', 'created_at', 'updated_at'];
+
+	public function agent()
+	{
+		return $this->belongsTo(Agent::class);
+	}
 }