如何通过API创建云观察报警时动态获取帐户ID和区域

I am making AutoRecovery alarm via API and i want to make my code work in any system by just calling the python script. but as every one has unique AWS account id and region can also be different, so i want to fetch account id and region dynamically. get-caller-identity is used for account id. but i ain't able to get how to use this function basically! I am making AutoRecovery alarm via API and i wa