Checking Email Validity

List users whose email matches the regex ^[A-Za-z][A-Za-z0-9._-]*@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$: exactly one @, the local part starts with a letter and contains only letters/digits/./_/-, and the domain ends with . plus at least 2 letters. Return user_id and email.