update apphub's password rule

apphub/src/utils/password_generator.py

@@ -10,7 +10,7 @@ class PasswordGenerator:
         lowercase_letters = string.ascii_lowercase      # all lowercase letters
         uppercase_letters = string.ascii_uppercase      # all uppercase letters
         digits = string.digits                          # all digits
-        special_symbols = "[]*+?~/|"                    # all special symbols
+        special_symbols = "[]*+?~"                      # all special symbols
 
         # get 4 random characters from each category
         password = [