Microsoft.AspNetCore.SignalR.Transports.LongPollingTransport.GetGroupsToken C# (CSharp) Method

        public override async Task<string> GetGroupsToken()
        {
            var groupsToken = Context.Request.Query["groupsToken"];

            if (groupsToken.Count == 0 && Context.Request.HasFormContentType)
            {
                var form = await Context.Request.ReadFormAsync().PreserveCulture();
                groupsToken = form["groupsToken"];
            }
            return groupsToken;
        }