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

Number of APIs: 3

1. Unassign all phone numbers

DELETE {{baseUrl}}/phone/shared_line_groups/:sharedLineGroupId/phone_numbers

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2. Assign phone numbers

POST {{baseUrl}}/phone/shared_line_groups/:sharedLineGroupId/phone_numbers

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3. Unassign a phone number

DELETE {{baseUrl}}/phone/shared_line_groups/:sharedLineGroupId/phone_numbers/:phoneNumberId

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