I tried to visit my.solytic and the apge timed out, but that might be because I dont have an account. I went to https://www.solytic.com/ but I didnt find API doc.
You may be able to create a new ThingHTTP and enter the url you gave above with your credentials. Persing the result can sometimes be difficult, so leave the parse string part empty for now. Id start with the GET method, but also try the post since you have to supply credentials. Leave the host blank or use my.solytic.com
If solytic has a documented API, you should be able to read their doc to get it working. If its not an open aPI, ThingHTTP probably wont work for you, Im sorry.