createRole method
Creates new role
var rb = new RoleBuilder()
..name = "Dartyy"
..color = DiscordColor.fromInt(0xFF04F2)
..hoist = true;
var role = await guild.createRole(roleBuilder);
Implementation
Future<Role> createRole(RoleBuilder roleBuilder, {String? auditReason}) =>
client.httpEndpoints.createGuildRole(this.id, roleBuilder, auditReason: auditReason);