Dispatched when a user joins a guild.
Converts a raw Discord payload into this event struct.
@type t() :: %EDA.Event.GuildMemberAdd{ avatar: String.t() | nil, deaf: boolean() | nil, guild_id: String.t() | nil, joined_at: String.t() | nil, mute: boolean() | nil, nick: String.t() | nil, pending: boolean() | nil, roles: [String.t()] | nil, user: EDA.User.t() | nil }
@spec from_raw(map()) :: t()