我正在嘗試使用驗證器根據此結構驗證請求正文。但是在Postman中，在驗證結構時，它總是會拋出錯誤。我只希望在提出請求時需要所有值。package modeltype User struct {    FeatureName string `json:"featureName" validate:"required"`    Email       string `json:"email" validate:"required"`    CanAccess   *bool  `json:"can_access" validate:"required"`}我已嘗試將其作為Postman上的請求正文發送：// Request body{    "featureName": "crypto",    "email": "[email protected]",    "can_access": true}// Response body{    "status": 422,    "message": "Missing parameters featureName/can_access/email"}法典：package controllerimport (    "database/sql"    "encoding/json"    "errors"    "net/http"    "unicode/utf8"    "github.com/yudhiesh/api/model"    "gopkg.in/validator.v2"    "github.com/yudhiesh/api/config")func InsertFeature(w http.ResponseWriter, r *http.Request) {    var user model.User    var response model.Response    db := config.Connect()    defer db.Close()    // Decode body into user struct    if err := json.NewDecoder(r.Body).Decode(&user); err != nil {        response.Message = "Error"        response.Status = http.StatusInternalServerError        json.NewEncoder(w).Encode(response)        return    } else {        // Validate struct to check if all fields are correct        // Fails here!        if err := validator.Validate(user); err != nil {            response.Message = "Missing parameters featureName/can_access/email"            response.Status = http.StatusUnprocessableEntity            json.NewEncoder(w).Encode(response)            return        }