OpenIntegrations/docs/en/examples/Dropbox/AddUsersToFolder.txt

    Token  = FunctionParameters["Dropbox_Token"];
    Email  = FunctionParameters["Dropbox_OtherUser"];
    Folder = FunctionParameters["Dropbox_SharedFolder"]; // shared_folder_id

    Result = OPI_Dropbox.AddUsersToFolder(Token, Folder, Email, False);