我正在尝试集成S3上传以上传视频文件，并尝试了DeveloperauthenticatedIdentity方法。一切都按照awsdocs配置说。DeveloperAuthenticatedIdentityProvider类:classDeveloperAuthenticatedIdentityProvider:AWSCognitoCredentialsProviderHelper{overridefunctoken()->AWSTask{//returnAWSTask//withtokenandwillsetidentityId}然后letdevAuth=DeveloperAuthen