def unlock(password)
      cmd = Xcode::Shell::Command.new "security"
      cmd << "unlock-keychain"
      cmd << "-p #{password}"
      cmd << "\"#{@path}\""
      cmd.execute
    end
def unlock(password)
      cmd = Xcode::Shell::Command.new "security"
      cmd << "unlock-keychain"
      cmd << "-p #{password}"
      cmd << "\"#{@path}\""
      cmd.execute
    end
Unlock the keychain using the provided password

 @param [String] the password to open the keychain