调用微信代金券接口：创建代金券，url：/v3/marketing/favor/coupon-stocks

body:{"available_begin_time":"2019-10-31T00:00:00.000+08:00","available_end_time":"2019-11-11T23:59:59.000+08:00","belong_merchant":"211266759","coupon_use_rule":{"available_merchants":["221620490"],"combine_use":true,"fixed_normal_coupon":{"coupon_amount":6000,"transaction_minimum":18000}},"no_cash":true,"out_request_no":"211266759201910181441354266876438954F3A904817A0ACF65B45","pattern_info":{"description":"隔天生效—单独使用—高级"},"stock_name":"34-180减60","stock_type":"NORMAL","stock_use_rule":{"max_amount":54000,"max_amount_by_day":0,"max_coupons":9,"max_coupons_per_user":5,"natural_person_limit":false,"prevent_api_abuse":true}}

belong_merchant传的服务商商户号，available_merchants传子商户号，no_cash是否又资金流字段传的true

 调用失败：{"code":"REQUEST_BLOCKED","message":"活动未开始或已结束\n"}

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