User post-registration script example

This is an example of a User post-registration script to be executed after a new user is registered to Sitecore Content Hub. It adds the user to a specific user group if the external provider is Google.

Use case

A new user is registered.
The script checks if the provider is Google. In that case, the user is added to the Google user group.

Script

RequestResponse

using System.Linq;

if (Context.ExternalUserInfo?.Provider != "Google") return;

var query = Query.CreateQuery(entities => 
  from e in entities
  where e.DefinitionName == "Usergroup" && e.Property("GroupName") == "Google"
  select e);

var googleGroupId = await MClient.Querying.SingleIdAsync(query);
if (!googleGroupId.HasValue) throw new InvalidOperationException("Google usergroup not found.");

var relation = await Context.User.GetRelationAsync<IChildToManyParentsRelation>("UserGroupToUser");
relation.Parents.Add(googleGroupId.Value);

await MClient.Entities.SaveAsync(Context.User);

Script explanation

Include the libraries to be used in the script.
RequestResponse
```
using System.Linq;
```
Check the external user provider. only the 'Google' provider is of interest.
RequestResponse
```
if (Context.ExternalUserInfo?.Provider != "Google") return;
```

Create a query that get the Google user group.

RequestResponse

var query = Query.CreateQuery(entities => 
from e in entities
where e.DefinitionName == "Usergroup" && e.Property("GroupName") == "Google"
select e);

Execute the query to get the Google group ID.

RequestResponse

var googleGroupId = await MClient.Querying.SingleIdAsync(query);

If the user group cannot be found, throw an InvalidOperationException.

RequestResponse

if (!googleGroupId.HasValue) throw new InvalidOperationException("Google usergroup not found.");

Get the user's user group relation.

RequestResponse

var relation = await Context.User.GetRelationAsync<IChildToManyParentsRelation>("UserGroupToUser");

Add the Google group to the user's object via the user group relation.
RequestResponse
```
relation.Parents.Add(googleGroupId.Value);
```

Save the user entity.

RequestResponse

await MClient.Entities.SaveAsync(Context.User);

Setup

Create a user group called "Google".
Create, publish and enable the User post-registration script with the source code above.

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