OptionalchannelThe channel to create the group on. Only "whatsapp" today, and the default when omitted.
OptionalfromThe line that creates the group and becomes its admin: its id, its number in
E.164, or a nickname. Provide exactly one of fromNumber or fromNumberId
(enforced by the server).
OptionalfromNumber id to create from. Legacy alternative to fromNumber — provide exactly one.
The group's name (subject), 1–100 characters.
The numbers to add, in E.164 — 1 to 256, deduplicated by the server. The creating line's own number is refused.
Parameters for DialClient.createGroup.