GuildMemberUpdateEvent.joined_at has incorrect type (according to Discord API docs)

[inklesspen]

According to the API docs, the joined_at field is nullable, but the data type in the struct is Timestamp, not Option<Timestamp>.

I don't know if the joined_at field ever is null, but the docs say it can be.

[ArtifyCZ]

I looked it up in the JDA (Java Discord API implementation). The Discord API sometimes omits the joined at field, and the JDA returns the time the guild was created at if the time the member has joined at is not present. They also provide a method on the Member entity to know whether the time is accurate or not. Also, in the Discord.Net implementation it's a nullable field.