In order to create an external group, you only need to enter the name of the group into the method – the name of the group you wish to create. For example: test-1-8-2023
The response will be the group_id, for example: 1045009
In order to sync contacts from external DB to contact group, you only need to enter the group_id from the previous method into this method.
You can add more parameters to this method: name, mobile number etc.