check if list of users exists on SQL table

check_users.sh

#!/bin/bash

# note
# you can use grep to count occurrences of each character in a string
# check total of non-exists and exists user with: grep -c '0' output_file.txt

email_file="emails.txt"  # File containing emails, assuming delimeted by CRLF
database="evaluasi"

# Loop through each email in the file
tr -d '\r' < "$email_file" | while IFS= read -r email; do
    # Query to check if the email exists in the users table
    query="SELECT COUNT(*) FROM users WHERE email = '$email';"
    
    # Execute the query using mysql client
    result=$(mysql --defaults-extra-file=config.cnf "$database" -se "$query")

    echo "$email -> $result"
done

example content of config.cnf:

[client]
user = "username"
password = "pw"
host = "localhost"