Authentication error || not authorized

[hussainmd]

Any one help…
how to troubleshoot this issue

Response body:
object(stdClass)#7 (1) {
[“errors”]=>
array(1) {
[0]=>
object(stdClass)#6 (3) {
[“category”]=>
string(20) “AUTHENTICATION_ERROR”
[“code”]=>
string(12) “UNAUTHORIZED”
[“detail”]=>
string(37) “This request could not be authorized.”
}
}
}
Thankyou

[Bryan-Square]

@hussainmd I took a look at your account and see successful API calls. Are you still running into this error? Also I see that you are calling the deprecated Transactions API. Is there a reason that you are using that API?