Authentication in Power BI

[prince_nema11]

In a Power BI, when i am loading the custom connector it asks for api key for the first time but after deleting the loaded data when I re-request the custom connector it doesn't ask for the key and load data without any authentication. So how can i pop/create authentication window for user to enter the key everytime he load the data from custom connector.

P.S - I created custom connector on VS.

[amitchandak]

@prince_nema11 , Home Tab -> Transform data -> Data Source Settings -> clear permissions