Retrieval Password from asp Membership tables

//web.config
machineKey validationKey="10B00B531A175EFE53065651BC315DDDDED9C1A6626D0996B1E18F6BEAC58153ACF7AC5306937C6C6C823C00BB8DB07F4D1CF4F4CF2CAC7EBEBB9463DC801B31" decryptionKey="4BCD239B9946A067517A3DBC503DAAE28BFE5C860A7037D25C547D85C4F55973" validation="SHA1" decryption="AES"

"add connectionStringName="UserManagement" minRequiredPasswordLength="6" enablePasswordRetrieval="true" passwordFormat="Encrypted" enablePasswordReset="true" requiresUniqueEmail="true" minRequiredNonalphanumericCharacters="0" requiresQuestionAndAnswer="false" applicationName="/InkyDB" name="AspNetSqlProvider" type="System.Web.Security.SqlMembershipProvider" "


on .aspx page

MembershipUser user = Membership.GetUser("piyush");

string password = user.GetPassword();