phone-users-{user Id}-outbound caller id/customized numbers

Number of APIs: 3

1. Add phone numbers for users' customized outbound caller ID POST {{baseUrl}}/phone/users/:userId/outbound_caller_id/customized_numbers

2. List users' phone numbers for a customized outbound caller ID GET {{baseUrl}}/phone/users/:userId/outbound_caller_id/customized_numbers?selected=true&site_id=SQv52YtkRLC2dwrDdYtGsA&extension_type=callQueue&keyword=408&page_size=30&next_page_token=BJLYC6PABbAHdjwSkGVQeeR6B1juwHqj3G2

3. Remove users' customized outbound caller ID phone numbers DELETE {{baseUrl}}/phone/users/:userId/outbound_caller_id/customized_numbers?customize_ids=8_RkKw9OQ42oYsXqJJjs4A&customize_ids=8_RkKw9OQ42oYsXqJJjs4A