exception "No Tokens exist for the given user-identifier,Please generate and try again."

Hi my firm is using zoho crm for customer management

I have encountered this exception when trying to push data from my backend to zoho crm .

I have debugged the code step by step and cannot figure out what exactly is failing in code.

Below are the indepth detail and some codes (im using ) for your reference.

Here is the getOAuthTokens function inside ZohoOAuthPersistenceByFile.php

    public function getOAuthTokens($userEmailId)
    {
        try {
            self::setIncludePath();
            $serialized = file_get_contents("zcrm_oauthtokens.txt", FILE_USE_INCLUDE_PATH);
            if (! isset($serialized) || $serialized == "") {
                throw new ZohoOAuthException("No Tokens exist for the given user-identifier,Please generate and try again.");
            }
            $arr = unserialize($serialized);
            $tokens = new ZohoOAuthTokens();
            $isValidUser = false;
            foreach ($arr as $eachObj) {
                if ($userEmailId === $eachObj->getUserEmailId()) {
                    $tokens = $eachObj;
                    $isValidUser = true;
                    break;
                }
            }
            if (! $isValidUser) {
                throw new ZohoOAuthException("No Tokens exist for the given user-identifier,Please generate and try again.");
            }
            
            return $tokens;
        } catch (ZohoOAuthException $e) {
            throw $e;
        } catch (Exception $ex) {
            OAuthLogger::severe("Exception occured while fetching OAuthTokens from file(file::ZohoOAuthPersistenceByFile)({$ex->getMessage()})\n{$ex}");
            throw $ex;
        }
    }

in the above function

1.) my $serialized variable contains string as follows

$serialized = "a:1:{i:0;O:37:"zcrmsdk\oauth\utility\ZohoOAuthTokens":4:{s:51:" zcrmsdk\oauth\utility\ZohoOAuthTokens refreshToken";s:70:"1000.178*************28";s:50:" zcrmsdk\oauth\utility\ZohoOAuthTokens accessToken";s:70:"1000.9***8c.94****1";s:49:" zcrmsdk\oauth\utility\ZohoOAuthTokens expiryTime";d:1643707868185;s:50:" zcrmsdk\oauth\utility\ZohoOAuthTokens userEmailId";s:24:"crmadmin@e******d.com";}}"

2.) $arr = unserialize($serialized);

$arr variable looks like below

array(1)

0:zcrmsdk\oauth\utility\ZohoOAuthTokens

refreshToken:null

accessToken:null

expiryTime:null

userEmailId:null

zcrmsdk\oauth\utility\ZohoOAuthTokens refreshToken:"1000.***********************88"

zcrmsdk\oauth\utility\ZohoOAuthTokens accessToken:"1000.***********8c.**************1"

zcrmsdk\oauth\utility\ZohoOAuthTokens expiryTime:1643707868185

zcrmsdk\oauth\utility\ZohoOAuthTokens userEmailId:"crmadmin@e******d.com"

3.)$tokens = new ZohoOAuthTokens();

my ZohoOAuthTokens.php as below

<?php
namespace zcrmsdk\oauth\utility;

use zcrmsdk\oauth\exception\ZohoOAuthException;

class ZohoOAuthTokens
{
    
    private $refreshToken;
    
    private $accessToken;
    
    private $expiryTime;
    
    private $userEmailId;
    
    public function getRefreshToken()
    {
        return $this->refreshToken;
    }
    
    public function setRefreshToken($refreshToken)
    {
        $this->refreshToken = $refreshToken;
    }
    
    public function getAccessToken()
    {
        if ($this->isValidAccessToken()) {
            return $this->accessToken;
        }
        throw new ZohoOAuthException("Access token got expired!");
    }
    
    public function setAccessToken($accessToken)
    {
        $this->accessToken = $accessToken;
    }
    
    public function getExpiryTime()
    {
        return $this->expiryTime;
    }
    
    public function setExpiryTime($expiryTime)
    {
        return $this->expiryTime = $expiryTime;
    }
    
    public function isValidAccessToken()
    {
        return ($this->getExpiryTime() - $this->getCurrentTimeInMillis()) > 1000;
    }
    
    public function getCurrentTimeInMillis()
    {
        return round(microtime(true) * 1000);
    }
    
    /**
     * userEmailId
     *
     * @return String
     */
    public function getUserEmailId()
    {
        return $this->userEmailId;
    }
    
    /**
     * userEmailId
     *
     * @param String $userEmailId
     */
    public function setUserEmailId($userEmailId)
    {
        $this->userEmailId = $userEmailId;
    }
}

$tokens variable has the value as below

zcrmsdk\oauth\utility\ZohoOAuthTokens

refreshToken:null

accessToken:null

expiryTime:null

userEmailId:null

the code fails exactly in the line

if ($userEmailId === $eachObj->getUserEmailId())

and throws exception in the line

if (! $isValidUser) {

throw new ZohoOAuthException("No Tokens exist for the given user-identifier,Please generate and try again.");

}

It would be really beneficial if you assist me to clear this issue.

thanks and regards,

M.sabarimurugan.