Hi Jignesh,
You need to update your DNS records so that they only point to your Azure App Service IP address. For example, login to your DNS provider's site and create an A record for @ that points to 20.119.136.19 and delete any A records for @ that are pointing to other IP addresses. Right now it appears you have an additional A record pointing to a different IP address so if you delete the wrong A record it will likely fix it.
Additionally, do the same for www, e.g. A record for www that points to 20.119.136.19 and remove other incorrect A records for www.
Please note it will take some time for the DNS changes to take effect, depending on what your TTL was set to.
I tested and was able to successfully see your login page, see screenshot:
Please Accept Answer and upvote if the above was helpful. If something is unclear add a comment below and I'll explain futher.
Thanks.
-TP