PHP Decode

<?   $sharedComponents = $this->sharedComponents; 
         
        $email = $data['email']; 
        $password = $data['password']; 
 
        $whereValues = array( 
            'email' => $email 
        ); 
 
        $selectResult = $sharedComponents->selectData("accounts", $whereValues, ""); 
 
        if (!isset($selectResult) || $selectResult["response"] != true) 
        { 
            return ['response' => false, 'message' => 'User Account Email does not exists']; 
        } 
        else 
        { 
            if ($selectResult && password_verify($password . $selectResult['data']['salt'], $selectResult['data']['password']))  
            { 
                // Generate a JWT token 
                $key = $config; 
                $payload = [ 
                    'trackingReference' => $selectResult['data']['trackingReference'], 
                    'email' => $selectResult['data']['email'], 
                    'userType' => "client" 
                    //'exp' => time() + 3600 // Token expiration time (1 hour) 
                ]; 
                $token = JWT::encode($payload, $key, 'HS256'); 
                 
                return ['response' => true, 'message' => "Authentication Successful", 'token' => $token]; 
            } 
            else 
            { 
                return ['response' => false, 'message' => 'Incorrect Password']; 
            } 
        } ?>