I know there is already a question asked before like this. but they doesn't have solution.
I've found the API to add a member to a group (https://developers.google.com/apis-explorer/#p/admin/directory_v1/directory.members.insert), but not to set these meta-values pertaining to that membership.
Can we get option to set email settings. like i want weekly or daily etc.
Here is link to old question :- Is it possible to set a user's group email notification settings via API?