Protocol Mapper Issue

[ghost]

When working with the protocol mappers I encounter a severe bug in the JSON implementation.
This class Keycloak.Net.Models.ProtocolMappers.Config should be changed to Dictionary<string,object>
Per the docs https://www.keycloak.org/docs-api/5.0/rest-api/index.html#_protocolmapperrepresentation this attribute it's type map meaning that there's not defined structure so a named based structure like the one you have is not working and will not retrieve all the information.
please change it to Dictionary class:
see also
https://docs.microsoft.com/en-us/dotnet/api/system.text.json.serialization.jsonextensiondataattribute?view=net-5.0
https://stackoverflow.com/questions/14893614/how-to-serialize-a-dictionary-as-part-of-its-parent-object-using-json-net

[ghost]

Suggested change:

Keycloak.Net.Models.ProtocolMappers.ProtocolMapper
[JsonProperty("config")]
public Config Config { get; set; }

should be replaced to:
[JsonProperty("config"), JsonExtensionData]
public Dictionary<string, object> Config { get; set; }

[AnderssonPeter]

I have created a new nuget package that has this fix https://www.nuget.org/packages/Keycloak.Net.Core/