public User GetUserByEmail(string email)
        {
            using var con = _dbConnectionService.GetDatabaseConnectionObject();
            string sql = @$ "SELECT * FROM users
                            WHERE email = '{email}';";

            con.Open();
            using var cmd = new NpgsqlCommand(sql, con);
            using NpgsqlDataReader reader = cmd.ExecuteReader();

            return(ParseUser(reader));
        }