Go to Settings, then Appearance. Scroll down to the advanced section until you see Developer Mode. Enable that!
The IDs can be retrieved from the following areas on Discord:
User IDs are obtained by right clicking usernames.
Server IDs are obtained by right clicking the Server Name, or by right clicking the Server Icon.
Channel IDs are obtained by right clicking on the channel
Message IDs are obtained by right clicking anywhere within the message.
Role IDs are obtained by right clicking on a server role.
Emoji IDs are obtained by adding a backwards slash, followed by the emoji. It should look like Image A before the message is sent. Then in Image B, the ID of the emoji will be provided for you.
Sticker IDs are obtained from using our
n!stickerpack commands as the native functionality on Discord to obtain them is not possible.