Commonly used when granting only one time access permission to a web or mobile application
सिर्फ़ इस बार
Easy-to-understand phrase. Users are able to differentiate this option from the other options during an Access Permission request.
सिर्फ़ इस बार अनुमति दें
Here are some things to keep in mind!
Users are aware of the process of granting permissions. This is why both translations are easily understood by them.