phone-shared line groups-{shared Line Group Id}-members

Number of APIs: 3

1. Unassign members from a shared line group DELETE {{baseUrl}}/phone/shared_line_groups/:sharedLineGroupId/members

2. Unassign a member from a shared line group DELETE {{baseUrl}}/phone/shared_line_groups/:sharedLineGroupId/members/:memberId

3. Add members to a shared line group POST {{baseUrl}}/phone/shared_line_groups/:sharedLineGroupId/members