public string GetToken([FromBody] RequstTokenUserModel userModel)
        {
            if (userModel == null || string.IsNullOrEmpty(userModel.Name) || string.IsNullOrEmpty(userModel.Password))
            {
                AddErrorResult("用户名和密码不能为空");
                return(string.Empty);
            }

            if (ValidateUser(userModel))
            {
                var claims = new[] { new Claim(ClaimTypes.Name, userModel.Name) };

                var key   = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["SecurityKey"]));
                var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);

                var token = new JwtSecurityToken(
                    issuer: _configuration["ValidIssuer"],
                    audience: _configuration["ValidAudience"],
                    claims: claims,
                    expires: DateTime.Now.AddMinutes(30),
                    signingCredentials: creds);

                return("Bearer " + new JwtSecurityTokenHandler().WriteToken(token));
            }
            else
            {
                AddErrorResult("用户名或密码错误");
            }

            return(string.Empty);
        }
 /// <summary>
 ///  验证用户名密码是否有效,需要根据系统逻辑实现。
 /// </summary>
 /// <param name="userModel">用户对象</param>
 /// <returns>
 ///  验证通过返回true,否则返回false
 /// </returns>
 private bool ValidateUser(RequstTokenUserModel userModel)
 {
     return(userModel.Name == "test" && userModel.Password == "test");
 }