Stape has two types of accounts:
You can easily share access and transfer ownership of your sGTM containers using stape admin.
To share access to your stape account click Account Settings -> Shared access -> Add Stape user email -> Click Share Access. Once done, a user will have access to all containers in your account.
To transfer ownership of the container, open the sGTM container -> Click three dots in the top right corner -> click transfer ownership -> add user email. Note: once ownership is transferred you will lose access to this container.