create_project_user: Add user in and existing project.
Description
Add user in and existing project.
Usage
create_project_user(project_id, user_mail, user_role)
Arguments
project_id
id of the project, can be obtained with get_projects().
user_mail
email of the user to be add.
user_role
role to grand to the user among "admin", "contributor", "viewer" or "end_user".
Value
list - information of project's users.