I keep my extensions under different amasty.com accounts. How do I manage the Composer keys?

I keep my extensions under different amasty.com accounts. How do I manage the Composer keys?

It is not possible to transfer or merge Composer keys. However, an alternative solution would be to provide access to the extension listed in one account for another account. The shared package will be available in both the accounts and thus, can be installed with either composer key pair. Please refer to the corresponding FAQ post for more details about this option. 

Another option would be to associate each amasty.com account with its own separate repository featuring distinct composer keys.