How to make something like "claim" function?

[moonfox7]

Hello, i have installed standart smart contract from this tutirial
https://developers.eos.io/manuals/eosio.contracts/latest/guides/how-to-create-issue-and-transfer-a-token
it's okey. i have transfer function, but how to make something like "claim", using this transfer for token from my site by my visitors.
i need to check if it is allowed to claim for certain account and how much user can claim by pressing "get tokens"
so, my enssuer acount must send tokens to user automaticaly