You can add users with either editing rights or reading rights
It is essential to share the project schedule with all stakeholders to ensure that contractors and project managers have the most up-to-date information.
When you open the project, you will find the "Users" section at the bottom of the dashboard. Clicking on this will display a view of all users associated with the project.
In the upper right corner, there is a button labeled "Invite User."
Clicking this button opens a window where you can enter the person's email address, name, teams and language of the Sign-in message.

You can see short descriptions of each access rights below the list of users. You can find more detailed descriptions in the access rights article.