Hi @Eshwar
Based on my searching, it seems that there is no way to pass credentials through the URL in Reporting Services. I found this link for you: https://stackoverflow.com/questions/15816251/how-to-pass-credentials-when-accessing-ssrs-report-through-url.
You can perform these operations by accessing the URL of the report server in SSRS: URL Access (SSRS).
If you want to access the exported report via URL, you can check this link: Export a Report Using URL Access.
Best regards,
Aniya