FEAT: Allow to overwrite cookie config with init values

Allow to overwrite cookie config with init values. Then, init values have preference over config values and also allows having authenticated config from config file and cookie config values from init.

Author: lluissalord

streamlit_authenticator/models/cookie_model.py

@@ -48,9 +48,9 @@ def __init__(
         """
         if path:
             config = Helpers.read_config_file(path)
-            self.cookie_name        = config['cookie']['name']
-            self.cookie_key         = config['cookie']['key']
-            self.cookie_expiry_days = config['cookie']['expiry_days']
+            self.cookie_name        = cookie_name or config['cookie']['name']
+            self.cookie_key         = cookie_key or config['cookie']['key']
+            self.cookie_expiry_days = cookie_expiry_days if cookie_expiry_days is not None else config['cookie']['expiry_days']
         else:
             self.cookie_name            =   cookie_name
             self.cookie_key             =   cookie_key