public async Task <(Session Session, SerializedSecurityToken Token)> JoinSession(string sessionId, Guid audienceId)
{
var session = await GetSession(sessionId);
if (session == null)
{
throw new SessionNotFoundException();
}
await _sessionRepo.AddAudience(sessionId, audienceId);
return(Session : session, Token : _sts.IssueToken(sessionId, audienceId, new [] { "Audience" }));
}
