Thanks for sharing your solution Milind. However since you have the SECURITYADMIN role, would it not be easier to grant yourself access to SNOWFLAKE database so you can query the ACCOUNT_USAGE.GRANTS_TO_USERS View?

ie.
use role SECURITYADMIN;
grant imported privileges on database SNOWFLAKE to role MYROLE;

use role MYROLE;
select * from snowflake.account_usage.grants_to_users;