Jira API cross origin issue

Hello community , i m new here
i have a React app , i m trying to use jira rest api but i m facing the cross origin issue

Axios.get("https://mydomaine-name.atlassian.net/jira-rest-api ",{
            headers: {
                "Access-Control-Allow-Origin": "*",
                'Content-Type': 'application/json',

                username: "MyuserName",
                password: "MyAPI-Token"

Access to XMLHttpRequest at 'https://mydomaine-name.atlassian.net/jira-rest-api' has been blocked by CORS policy

i tried may options , and i changed from Axios to fetch but always the same issue
( its just a simple client app wich mean i don’t have a back-end )
Any help please !