This method allows adding members to a given channel. The user adding the members must be a member of the channel and must have permission to modify the member list.
|String||Yes||Authentication token of the user|
|String||Yes||Id of the channel|
|Array||Yes||An array of user ids that will be added to the channel|
An object where the keys are user ids that were to be added and the value is a ChannelMemberStatus, indicating whether the user was successfully added or not.