Update Alternative customer ID from Customer User in CCO Manager via API

[AaronMendieta]

Hi Experts!

I need to update the Alternative customer ID field from customer users via API:

I have been reviewing the documentation (server:port/ccos/api-documentation) in Swagger UI, however, does not seem to exist any service to achieve this operation:

Do you know if there is any other list or documentation with a wider variety of services? or If there is another way to update the field via API?

Thanks in advance, best regards!