ApiApp.GetUsersApiKeyController.Post C# (CSharp) Метод

        public string Post([FromBody] string username)
        {
            if (username.IsEmpty())
            {
                return "Missing Username";
            }

            var user = UserManager.Get(username);

            if (user == null)
            {
                return "Wrong username";
            }
            else
            {
                return user.Entity.ApiKey;
            }
        }