src/Twitter/Client.php
public function connect()
    {
        if($this->credentials instanceof AppCredentials)
        {
            //set application specific connection
            $this->connection = new AppConnection($this->credentials);

            return $this->connection;
        }
        else
        {
            //set User specific connection
            $this->connection = new UserConnection($this->credentials);

            return $this->connection;
        }
    }
public function connect()
    {
        if($this->credentials instanceof AppCredentials)
        {
            //set application specific connection
            $this->connection = new AppConnection($this->credentials);

            return $this->connection;
        }
        else
        {
            //set User specific connection
            $this->connection = new UserConnection($this->credentials);

            return $this->connection;
        }
    }
Checks the type of $credentials (if App or User) and returns a new connection instance accordingly.

@return AppConnection|UserConnection Type of connection to Twitter.