c# 4.0 - How to manage state between android app and ASP.net Web API? -


we have android app through retailer can recharge customers mobile. need authorize every recharge request.

to send recharge request retailer needs hit api recharge related information , userid , userkey. below

[acceptverbs("get")]     public ihttpactionresult prepaid(int puserid = -1, string pkey = "", string pcustomerno = "", decimal pamount = 1, int pserviceproviderid = -1, int pdevicetypeid = -1)

we authenticate user every api hit comparing userkey(encrypeted password) password stored in db

this makes many db calls , our server gets slow

its b2b app , retailer perform different kind action transaction history, credit request, book complaint other recharge

how maintain state after user login android app

if userkey unique identification every user, or every 1 unique mobile number, think better verify mobile number user using make recharge sending otp. user can send otp authentication. @ time of login, , store unique user key have generated in shared preference storage.


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