[WEB-5518]: update magic code token to send code as 6 digit numbers (#8188)

* refactor: simplify token generation in MagicCodeProvider by using a numeric approach

* fix: update placeholder text for unique code input across multiple languages

* refactor: replace token generation with a numeric approach for user email updates

* fix: update placeholder text for unique code input in multiple languages to a numeric format

* refactor: replace random token generation with secrets for enhanced security in user email updates and magic code provider

apps/api/plane/authentication/provider/credentials/magic_code.py

@@ -1,8 +1,7 @@
 # Python imports
 import json
 import os
-import random
-import string
+import secrets
 
 
 # Module imports
@@ -50,13 +49,7 @@ class MagicCodeProvider(CredentialAdapter):
 
     def initiate(self):
         ## Generate a random token
-        token = (
-            "".join(random.choices(string.ascii_lowercase, k=4))
-            + "-"
-            + "".join(random.choices(string.ascii_lowercase, k=4))
-            + "-"
-            + "".join(random.choices(string.ascii_lowercase, k=4))
-        )
+        token = str(secrets.randbelow(900000) + 100000)
 
         ri = redis_instance()