const paidAgreement = async (body, userId) => {
    return postModel.findOne({
        include: {
            model: agreementModel,
            where: {
                id: body.agreementId
            }
        }
    }).then(post => {
        if (isPostCreator(post, userId)) {
            if (post.agreements[0].status === enums.agreementStatus.done) {
                return agreementModel.update({
                    status: enums.agreementStatus.paid
                }, {
                    where: {
                        id: post.agreements[0].id
                    },
                    returning: true
                });
            } else {
                throw "agreement not accepted"
            }
        }
        else
            throw "wrong user"

    });
};