Custom_Postman_PreRequest_Script____ASP_NET_API_Tutorial

prerequest_postman.js

let jwtFetchError = "Failed to gather JWT Token - check if your API is running, select a Postman Environment -- and make sure to have added the 2 default accounts (query can be found in prerequest script -or- in the documentation)";

if(JSON.parse(pm.environment.get("LOGIN_WITHOUT_AUTH"))){
    console.log("No JWT Token was fetched due to the selected Postman Environment");
    return;
}

pm.sendRequest({
    rejectUnauthorized: false,
    url: pm.environment.get("API_HTTP_PROTOCOL") + 
        pm.environment.get("API_HOST") + ":" +
        pm.environment.get("API_PORT") + 
        pm.environment.get("API_LOGIN_PATH"), 
    method: 'POST',
    header: 'Content-Type:application/json',
    body: {
        mode: 'application/json',
        raw: JSON.parse(pm.environment.get("LOGIN_WITH_INVALID_CREDS")) ?
                pm.environment.get("API_LOGIN_INVALID_CREDS") :
            JSON.parse(pm.environment.get("LOGIN_AS_MANAGEMENT")) ?
                pm.environment.get("API_LOGIN_ADMIN_CREDS") :
                pm.environment.get("API_LOGIN_USER_CREDS")
    }
}, function (err, res) {
    if(err) {
        console.error(jwtFetchError);
    }

    if(res) {
        if(!res.json().content?.length){
            console.error(jwtFetchError);
        }

        let token = res.json().content[0];
        console.log("Successfully received JWT Token - setting header", res.json())
        pm.request.headers.add("Authorization: Bearer "+token);
    }
});