everyone , As it says in the OP you need to add the custom token to your wallet. Add the addres, token symbol and decimal places (18) and then your coins will show if you already go them in the airdrop.
Contract Address: 0x8F56b7Ea90a0f63FC7a702FB08e168d77dbcc905
Symbol: SDRN
Decimals: 18
waitting for dev airdrop
I did what it says on the OP but still didn't get my airdrop