当创建一个客户端的时候，自动创建一个API Token

tasks/models.py

@@ -1,5 +1,6 @@
 from django.db import models
 from django.utils import timezone
+import secrets
 
 # Status choices for tasks
 STATUS_CHOICES = [
@@ -20,6 +21,13 @@ class Client(models.Model):
 
     def __str__(self):
         return self.name
+    
+    def save(self, *args, **kwargs):
+        # Generate a unique token if this is a new client
+        if not self.pk and not self.token:
+            # Use secrets module to generate a secure random token
+            self.token = secrets.token_urlsafe(64)  # 64 bytes -> ~86 characters
+        super().save(*args, **kwargs)
 
     class Meta:
         verbose_name = '客户端'