You can invite people to your Strattic account from the Team menu item within your Strattic Dashboard:

There are several ways to invite people to work with you in Strattic:
Owner (all sites):
This role can access and launch all of your sites. They can view all technical information such as SFTP and SQL credentials. They can also add/edit/delete users and add/edit/delete sites. Owners also have access to view/edit billing information.Admin (all sites):
This role can access and launch all of your sites. They can view all technical information such as SFTP and SQL credentials. They can also add/edit/delete users and add/edit/delete sites.Site Manager (selected sites):
Users with this role can access and launch sites. They can view all technical information such as SFTP and SQL credentials. They can also add/edit/delete other Site Managers or Site Collaborators and connect custom domains.Site Collaborator (selected sites):
Users with this role can access and launch selected sites.
Note: Adding users to your Strattic account will not automatically add them as a user in WordPress. To add a new user to your WordPress website you need to login to the WordPress dashboard then click Users → Add New. Once there just fill in the required info.