How to reauthorize a transaction ?
What do you mean reauthorize?
You can see all the transaction type at the api reference
In my scenario I am auhtorizing credit card details first so that can use it later on after that using that card details for payments.So while again using the card details want to reauthorize the transaction can it be done ?
No. you need to auth with the amount. Sound like you are going to use customer profile from your many other posts.