How to signout the account from OAuth2.0 inside the app?

I’m using OAuth2.0 for accessing the JIRA projects etc in my app. So, I showed WebView for the Authentication to access the Tokens, Id and showed the project list. But, from inside of my app, I have to sign out from the account and have to enter into a different account. For now, I’m clearing the data from my app in App Settings and then using it. Kindly give suggestion and ideas. Looking for the quick response. I stuck here for more than 5hrs. I’m waiting to learn some new thing today with your responses.