rest_cannot_create Sorry, you are not allowed to create posts as this user in WordPress REST API

The issue:

When we were working with WordPress REST API, we got into this issue. We were trying to create a post in WordPress using WordPress post API (/wp-json/wp/v2/posts). Following is the issue:

{
    "code": "rest_cannot_create",
    "message": "Sorry, you are not allowed to create posts as this user.",
    "data": {
        "status": 401
    }
}

Reasons:

This can happen for multiple reasons.

• In our case this happend because the very first attempted we tried the post request without any authentication.
• Then we tried the post request with a user credential who didn’t have access

Solution:

We had to use a JWT plugin to generate an authentication token. Following is a plugin that we can use to generate the authentication token:
https://wordpress.org/plugins/jwt-authentication-for-wp-rest-api/

Once we got the token we call the post request like below and it solved the issue:

create_post_url = WP_API_ENDPOINT + "/wp/v2/posts"
headers = {'content-type': 'application/json', 'Authorization': "Bearer " + wordpress_token}