增加vivo支付与登录接口

package/pay/vivo/model.go

@@ -0,0 +1,11 @@
+package vivo
+
+type TokenAuthResponse struct {
+	ReturnCode int                    `json:"retcode"`
+	Data       *TokenAuthResponseData `json:"data,omitempty"`
+}
+
+type TokenAuthResponseData struct {
+	Success bool   `json:"success,omitempty"`
+	OpenId  string `json:"openid,omitempty"`
+}