GRANT Permissions command
See the following article for more information:
The GRANT Permissions command allows you to add users as viewers or editors to the current folder or a subfolder. Only existing Crunch users in your account can be added with this command.
GRANT PERM_TYPE ON HERE TO "email1", "email2";
GRANT PERM_TYPE ON grant_path TO "email1", "email2";
Example
GRANT VIEWER ON "Path|To" TO "example@example.com", "example1@example.com";
GRANT EDITOR ON HERE TO "example2@example.com";