Ionic + React 如何在 api 调用后返回 Promise<UserModel>？

如何解决Ionic + React 如何在 api 调用后返回 Promise<UserModel>？

我想将 API 响应 JSON 返回到模型类中。

示例代码如下：

const authenticateUserAsync = async  (username: string,password: string) : Promise<usermodel> => {

const loginData = {
     "Username": username,"Password": password
}

const api = axios.create({
    baseURL: "https://www.something.com/api/services"
})

const resp = await api.post("/ValidateUserPost",loginData)

if(resp.data != null && resp.data.userId != null && resp.data.userId > 0){    
    
    //How to convert the JSON Response to Model Class
    return resp.data.map((user: usermodel) => {UserId: user.userId,FirstName: user.FirstName })

} 
else
    return NULL User Model
};

我要返回的模型类如下所示：

export interface usermodel {
    UserId: Number;
    CustomerId: number;
    FirstName:string;
    LastName:string;
}