Unassigns a role from group members.
Note: This function is only relevant for site admins, and group members with group admin permissions.
The unassignRole()
function returns a Promise that resolves to the unassigned role after it has successfully been unassigned. This function only applies
to admin roles. Using this function with member roles returns an error.
Group ID and member IDs.
Group member role to unassign.
Authorization options.