Can I share my GitHub account with my clients after the contract has already started?

[09490749]

I have completed a contract, but the customer has requested that another feature be added to the project.

Even if I am working on the same project, he signed one contract per feature, and the contract ends when the feature is updated. During that project is going, I uploaded and downloaded the entire project files via Upwork chat. It took a long time to compare my and the customer's source code.
So a client suggested the GitHub version control system. He requested my email address via chat. However, all contracts were completed at that time. So I said that I couldn't share my account until he started the contract, he created another contract and I accepted his offer.
Can I provide him with my GitHub account information then?

And also can I ask him project GitHub repository URL before starting contract?

Thanks.

[spectralua]

Yes, you can share details after contract started. Git and other required tools.

You cannot share any contact info without contract. But you did all right.