我不确定您是否找到了另一种方法，但我希望您使用服务调出策略来调用身份验证服务器，如下所示：

<ServiceCallout async="false" continueOnError="false" enabled="true" name="SC-GetAuthPass">
<DisplayName>SC-GetAuthPass</DisplayName>
<Properties/>
<Request clearPayload="true" variable="ABCDLogin">
    <Set>
        <Headers>
            <Header name="Content-Type">application/x-www-form-urlencoded</Header>
        </Headers>
        <Verb>POST</Verb>
        <FormParams>
            <FormParam name="username">{server_username}</FormParam>
            <FormParam name="password">{server_password}</FormParam>
        </FormParams>
    </Set>
    <IgnoreUnresolvedVariables>false</IgnoreUnresolvedVariables>
</Request>
<Response>calloutResponseGetAuthPass</Response>
<HTTPTargetConnection>
    <Properties/>
    <URL>{authentication_server_url}</URL>
</HTTPTargetConnection>

然后我就可以提取令牌并将其传递给Apigee

<JSONPayload>
    <Variable name="authpass">
        <JSONPath>$.</JSONPath>
    </Variable>
 </JSONPayload>
 <Source clearPayload="false">calloutResponseGetAuthPass</Source>

然后，您可以使用提取的令牌调用验证端点（我假设这是另一个服务标注）