使用Cognito，我可以获得代表“我”的“未经身份验证”的identityId。认知如何阻止别人声称自己是“我”？
GetCredentialsForIdentityRequest request = new GetCredentialsForIdentityRequest();
request.setIdentityId("us-west-2:639dc6e0-1f14-4c0a-9a08-a48c742f5395"); //Could I just enter whatever identity Id I want here? Is knowing what the identityId is the security? Is that really secure?
GetCredentialsForIdentityResult result = cognitoIdentityClient.getCredentialsForIdentity(request);
从AWS JAVA SDK显示的代码