human
how to check if email and password exist.
assistant
Here is a Python code to check if email and password exist

import re

def email_password_check(email, password):
        """
        Checks if email and password exist.
        :param email: email
        :param password: password
        :return:
        """
        if not email:
            raise ValueError("email is required")
        if not password:
            raise ValueError("password is required")
        return email.lower() == email and password.lower() == password

# Enter the email and password
email = "user@example.com"
password = "password"

# Calling the function
print((email_password_check(email, password)))

#Example Output
# True

#Remember to inspect code for bugs.