错误400失败前提条件服务器端gmail api php

Question

hi im trying to get a list of my email using gmail api with php but i got error 400, is PHP for Gmail API is still developed or just im doin it wrong ?

$optParams = [];
    $optParams['maxResults'] = 5; // Return Only 5 Messages
    $optParams['labelIds'] = 'INBOX'; // Only show messages in Inbox
    $optParams['q'] = 'from: "abc"'; // Only show messages in Inbox
    $list = $gmail->users_messages->listUsersMessages("my email",$optParams);

btw i'm non g suite and using service account Thanks

--- update ---

Here's my $gmail variable source

 putenv('GOOGLE_APPLICATION_CREDENTIALS='.base_path('service_account.json'));
   $client->useApplicationDefaultCredentials();
    $client->setScopes(\Google_Service_Gmail::MAIL_GOOGLE_COM);
    $client->setAccessType('offline');        // offline access
    $client->setIncludeGrantedScopes(true);   // incremental auth
    $gmail = new \Google_Service_Gmail($client);