API end point not giving a security dialog box

There is an existing API end point where there are existing Ultra tasks along with other assets like pipelines etc. when I browse the API end point URL in a browser it will prompt a dialog box "sign into access this site" as oAuth2clientcrendtial along with Authorize by role added as a policy, I added a new pipeline and associated ultra task under the same API end point but it will not prompt for the security login dialog box which it does for other ultra pipelines tasks,  what configuration am i missing?