I installed one particular app two months ago. When I opened it the first time, a popup opened with a suggestion to enable the screen lock pin. And I enabled the screen lock. From that time whenever I opened the app it always asks for the pin. I used the app for the last two months without any problem. But from the last few days, I can't open the same application because it is showing to enter the pin even after I entered the correct pin. I thought it was a bug of that particular application and I reported it to them. They told me that the application does not asks for pin to access it. I was told to check access and security credentials in my phone, to open the apps and remove the app from the list of the apps. But I can't find any setting to check it on my phone. Could anyone tell how to check the access and security credentials to open the apps and how to remove it ?