Invite people to Zoho CRM (Zoho one subscription)

Invite people to Zoho CRM (Zoho one subscription)

Hi everyone, 

I was wondering if there was any way of inviting people/guests to my CRM ? Is that someting feasable ?

I need my subcontractor to be able to use it sporadically, when we work together. Alternatively, could i just let him use my own account ? 

Thank you so much for your help, I am lost !