Keystore name     :- widemart
Keystore password :- widemart@123
Alias name        :- widemartalias
Alias password 	  :- widemartalias@123

copy myaz-release.apk to app folder
cd to app folder
keytool -genkey -v -keystore widemart.keystore -alias widemartalias -keyalg RSA -keysize 2048 -validity 10000

Rajkumar Arya
Dakshith Technologies
Dakshith Technologies
Gurgaon
Haryana
IN
yes

jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore widemart.keystore app.aab widemartalias
copy signed apk to C:sdk\sdk\build-tools\25.0.3
cd to C:\sdk\sdk\build-tools\25.0.3
c:\
zipalign -v 4 app.aab widemart.aab
copy final zipaligned fbc.apk to app\fbc folder
visit https://play.google.com/apps/publish and upload final apk to it.