<human>:  how to check if email and password exist.
<bot>: 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.