modify: auth插件拆分，将token签发部分交给网关

workers/auth/login.toml

@@ -1,13 +0,0 @@
-[POST]
-cacheable = false
-auth_required = false
-summary = "登录"
-docstring = "根据用户名和密码进行登录，登录成功返回token，获取请求需带式token进行请求"
-params = ["username: str", "password: str"]
-
-[POST.response_model]
-result = {type = "str", required = true}
-token = {type = "str", required = true}
-message = {type = "str", required = true}
-timestamp = {type = "float", required = false}
-