Getting EDIT_ISSUES error when trying to add steps to the test case using Jira Cloud API

[Sai Audithya Sarvabhotla]

Hi,

I am trying to add steps using below API by generating the JWT token and passing correct accountID, secret keys and access tokens but i am not able to add steps using the API

End point: https://prod-api.zephyr4jiracloud.com/connect/public/rest/api/1.0/teststep/713627?projectId=10010

Request headers - Authorization  and zapiAccessKey

Response:
{
"errorType": "ERROR",
"clientMessage": "User does not have EDIT_ISSUES permission to perform the operation...",
"errorCode": 169
}

i have created the testcase using jira api and it got created successfully and also checked mypermissions for that test case and it says i have edit access but using the above API getting error

https://epssw.atlassian.net/rest/api/3/issue

{

    "id": "713640",

    "key": "TESTPROJ-20729",

    "self": "https://epssw.atlassian.net/rest/api/3/issue/713640",

    "watchers": {

        "status": 200,

        "warningCollection": {

            "warnings": []

        }

    }

}

 https://epssw.atlassian.net/rest/api/3/mypermissions?projectKey=TECHNIQUE&issueKey=TECHNIQUE-20729&permissions=EDIT_ISSUES

https://epssw.atlassian.net/rest/api/3/mypermissions?projectKey=TECHNIQUE&issueKey=TECHNIQUE-20729&permissions=EDIT_ISSUES