Signatures of certificate is not generated after taking signed apk build

Hi Team,

I have running my project using cmd and always takes build through commands in ionic.

While taking signed apk, running jarsigner command is not generating the signature of certificate.

I am using PackageManager plugin to get the details of signatues.

But after getting the object from plugin signature value is empty.

Kindly suggest the solution to fix this build process issue.

Regards,
K Mohammad Mujahid