ProjectUserRole Objects
ADMINint - Represents an admin user with value 0.ANNOTATORint - Represents an annotator user with value 1.REVIEWERint - Represents a reviewer user with value 2.ANNOTATOR_REVIEWERint - Represents a user who is both an annotator and a reviewer with value 3.TEAM_MANAGERint - Represents a team manager user with value 4.
ProjectUser Objects
user_emailstr - The email address of the user.user_roleProjectUserRole - The role of the user in the project, defined by the ProjectUserRole enumeration.project_hashstr - A unique identifier for the project.

