React Native - Sqlite Save database array in a variable

Question

I use react native and sqlite (all expo). I want to save sql data inside a variable, but I do not know how.

return new Promise((resolve, reject) => {
            db.transaction(tx => {
                tx.executeSql(
                'SELECT ID_user, username, nome_empresa FROM tb_user WHERE username = ?;',
                    [route.params.paramKey],
                    //-----------------------
                    (_, { rows }) => {
                        if (rows.length > 0){ 
                            resolve(rows._array)
                        }else{ reject("Obj not found");} // nenhum registro encontrado
                        },
                        (_, error) => reject(error)  // Success
                );
            });
        });

I want to save ID_user, username and company_name because I want to show it on screen