Create collaboration

Adds a collaboration for a single user or a single group to a file or folder. Collaborations can be created using email address, user IDs, or a group IDs. If a collaboration is being created with a group, access to this endpoint is dependent on the group's ability to be invited. If collaboration is in `pending` status, the following fields are redacted: - `login` and `name` are hidden if a collaboration was created using `user_id`, - `name` is hidden if a collaboration was created using `...