share username with keychain between two application

Question

for sharing the data from keychain is there any specific plugin for getting the data from native keychain like if we are saving username in x application in keychain so is there any plugin or dependency which can help us to get username data from x application to y application? i tried shared_preference_app_group but it is not giving expected result. i just want to access username which is saved in keychain in x app, i want to use that username in y application.