Add initial Code

app/Models/PaymentTerms.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class PaymentTerms extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'name',
+        'description',
+        'is_fixed',
+        'days'
+    ];
+
+    /**
+     * Get the customers that use this payment term.
+     */
+    public function customers()
+    {
+        return $this->hasMany(Customer::class);
+    }
+}