Not able run the flow through URL

Hi All,


I am facing issue while executing the flow through urls in browser,


i have passed the username and password through url, 


localhost:8080/.../My Ops Flows/Test/DNS Lookup?username="admin"&password="admin"


when i use the above URL in browser and its prompting to enter username and password, it should not ask for username and password since we have passed the values in url, but here it is asking ,once i give credentilas, its runs and return output in XML format,here i can see, flowResponse as "failure" and flowReturnCode is "Error".


Kindly please advice me on this, how can i bypass the username and password and get the flow success.


Please find attached screenshots for reference