Sign new code for new redirect

Signed-off-by: Asai Neko <sugar@sne.moe>

service/auth/redirect.go

@@ -109,13 +109,19 @@ func Redirect(c *gin.Context) {
 		return
 	}
 
+	newCode, err := authcode.NewAuthCode(email)
+	if err != nil {
+		c.JSON(500, gin.H{"status": "internal server error"})
+		return
+	}
+
 	url, err := url.Parse(redirectUri)
 	if err != nil {
 		c.JSON(400, gin.H{"status": "invalid redirect uri"})
 		return
 	}
 	query := url.Query()
-	query.Set("code", code)
+	query.Set("code", newCode)
 	url.RawQuery = query.Encode()
 
 	c.Redirect(302, url.String())