client,gotd: refactor connection event handling

This might cause regressions if the onSession handler was load bearing

pkg/gotd/telegram/client.go

@@ -64,7 +64,7 @@ type Client struct {
 	resolver       dcs.Resolver           // immutable
 	onDead         func()                 // immutable
 	onAuthError    func(error)            // immutable
-	onConnected    func()                 // immutable
+	onConnected    func(*tg.User)         // immutable
 	newConnBackoff func() backoff.BackOff // immutable
 	defaultMode    manager.ConnMode       // immutable
 

pkg/gotd/telegram/connect.go

@@ -43,7 +43,7 @@ func (c *Client) runUntilRestart(ctx context.Context) error {
 
 			c.log.Info("Got self", zap.String("username", self.Username))
 			if c.onConnected != nil {
-				c.onConnected()
+				c.onConnected(self)
 			}
 			return nil
 		})

pkg/gotd/telegram/options.go

@@ -56,7 +56,7 @@ type Options struct {
 	OnAuthError func(error)
 	// OnConnected will be called when the connection has been established and
 	// the user has been fetched successfully.
-	OnConnected func()
+	OnConnected func(*tg.User)
 	// MigrationTimeout configures migration timeout.
 	MigrationTimeout time.Duration