Github API v3, post issues / authentication - api

Question

I am working on a project making a Kanban board using the Github API v3.
I have no problem with get methods, but when it comes to post methods i get a 404 response, and from what i read in the documentation, this seems to be a authentication error.
I am using personal token for authentication, and have successfully posted through postman, but when i try to post through my own application i get the error.
Link to project if anyone's interested : https://github.com/ericyounger/Kanban-Electron
Below is the code used for posting to github.
Might there be a problem with my code below? Or might it be settings in relation with the token?
postIssue(json){
let packed = this.packPost(json);
return Axios.post(`https://api.github.com/repos/${this.user}/${this.repo}/issues`, packed);
}
packPost(json) {
return {
method: "POST",
headers: {
"Authorization": `token ${this.tokenAuth}`,
"Content-Type": "application/json"
},
body: JSON.stringify({title: json.title})
};
}
This is what i receive:
{message: "Not Found", documentation_url: "https://developer.github.com/v3/issues/#create-an-issue"}
message: "Not Found"
documentation_url: "https://developer.github.com/v3/issues/#create-an-issue"
Console log error message

Answer 1

Without seeing any detailed logs, my first attempt would be to set body to not send the string representation of the body
body: {title: json.title}

Answer 2

This did the trick :)
postIssue(json){
const headers = {
'Content-Type': 'application/json',
'Accept': 'application/vnd.github.v3.raw',
"Authorization": `token ${this.tokenAuth}`,
};
return Axios.post(`https://api.github.com/repos/${this.user}/${this.repo}/issues`, json , {headers: headers});
}