List all the username and passwords of users with the most popular role.
SELECT user_name ,  password FROM users GROUP BY role_code ORDER BY count(*) DESC LIMIT 1
SELECT user_name ,  password FROM users GROUP BY role_code ORDER BY count(*) DESC LIMIT 1
[{'user_name': 'tremblay.raheem', 'password': '9bc25a040d5647ced5ec32e1a455e90fafc10bcb'}]