399 	return code_verifier;

   399 	return code_verifier;

   400 end

   400 end

   401 

   401 

   402 function verifier_transforms.S256(code_verifier)

   402 function verifier_transforms.S256(code_verifier)

   403 	-- code_challenge = BASE64URL-ENCODE(SHA256(ASCII(code_verifier)))

   403 	-- code_challenge = BASE64URL-ENCODE(SHA256(ASCII(code_verifier)))

   405 end

   405 end

   406 

   406 

   407 -- Used to issue/verify short-lived tokens for the authorization process below

   407 -- Used to issue/verify short-lived tokens for the authorization process below

   408 local new_user_token, verify_user_token = jwt.init("HS256", random.bytes(32), nil, { default_ttl = 600 });

   408 local new_user_token, verify_user_token = jwt.init("HS256", random.bytes(32), nil, { default_ttl = 600 });

   409 

   409