Example to create plugin manifest for groupshare

CsvAuthenticationProvider.plugin.xml

<?xml version="1.0" encoding="utf-16"?>
<plugin id="Unique id of your plugin" name="name of your plugin" version="the plugin version">
  <!--public key token has to be the same for all the plugins so do not change the value from this sample. you need to sign your plugin assembly to have this public key toke-->
  <extension type="{Name of your type including the namespace}, {Assembly name}, Version={Assembly version}, Culture=neutral, PublicKeyToken=c28cdb26c445c888">
    <extensionAttribute type="Sdl.StudioServer.Api.Core.CustomAuthenticationProviderExtentionAttribute, Sdl.StudioServer.Api.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c28cdb26c445c888">
      <constructorArgs />
      <properties>
        <property name="CanValidateUserExistance">True</property>
      </properties>
    </extensionAttribute>
    <auxiliaryExtensionAttributes />
  </extension>
</plugin>